Vol 6, No 2-4 (2012)
- Year: 2012
- Articles: 68
- URL: https://journals.eco-vector.com/2074-0530/issue/view/3762
Articles
The study of the disperse composition of the liquid torch spray of centrifugal-jet nozzle
Abstract
This paper presents the results of a research on dispersion of water spray of centrifugal spray nozzle. The values of average droplet size are defined and compared with the known one calculated before. There were made graphics of drops dispersed distribution and graphics where the experimental and calculated values for the arithmetic mean and median mass diameter. The obtained data allow to recommend the calculated dependencies for the assessment of medium-sized drops in the spray of centrifugal-jet spray nozzle.
Izvestiya MGTU MAMI. 2012;6(2-4):7-11
7-11
Methods of visualization of hydrodynamics and non-stationary heat exchange in granular media
Abstract
The paper presents the results of experiments on the visualization of the temperature fields and development of convective flows in the process of non-stationary conductive heating of the cell wall which includes a layer of filled balls placed into the liquid. The authors developed the calculation method for modeling of the process of warming up of cells and the development of convection under various boundary conditions.
Izvestiya MGTU MAMI. 2012;6(2-4):11-20
11-20
Hydrodynamics of free floating gas shells in inclined pipes with granular nozzle
Abstract
The paper presents an experimental research on hydrodynamics of floating free gas shells in inclined pipes with granular nozzle in the systems gas-liquid and gas-liquid-solid particles. Working substances were water and ethanol. It is shown that the speed of ascent, depending on the angle, has nonmonotonic character and maximums of speeds, when adding a solid phase, shift in the direction of large angles of the handset relative to the horizon.
Izvestiya MGTU MAMI. 2012;6(2-4):20-26
20-26
Determination of the velocity field, the pressure and temperature in the convergent channel centrifugal extrusion granulator
Abstract
The paper is based on a system approach which helps to develop a model of multiple centrifugal-extrusion granulator. The process of flow non-Newtonian environment is shown and the reological characteristics of it are introduced through «power» law of Ostvald - de Wil in a rotating converged curvilinear channel.
Izvestiya MGTU MAMI. 2012;6(2-4):26-33
26-33
The motion of a solid spherical particle in a two-layer film of non-Newtonian fluid flowing through the inner surface of the centrifugal cone nozzle
Abstract
The paper considers the motion of a solid spherical particle in a two-layer film of non-Newtonian fluid flowing through the inner surface of the centrifugal cone nozzle during the process of the application of film-forming coatings on granular materials.
Izvestiya MGTU MAMI. 2012;6(2-4):33-39
33-39
The study of the intensity of the heat generation of led light sources for cultivation of light-dependent organisms
Abstract
The paper presents the problem of heat generation of artificial light sources (LEDs) during cultivation light-dependent organisms. The practical research on this issue is made on the example of the cultivation of the green microalgae Chlorella sp.
Izvestiya MGTU MAMI. 2012;6(2-4):39-42
39-42
The directions of development of photovoltaic technologies, taking into account resource limitations
Abstract
The author considers resource limitations that arise under intensive development of renewable energy and, in particular, on the basis of solar photovoltaic power generation. The prospects of photovoltaic devices based on silicon solar cells with vertical p-n junctions are shown in this article.
Izvestiya MGTU MAMI. 2012;6(2-4):42-47
42-47
The study of the equilibrium speed of sound vapor-liquid environment with grainy layer with a view of thermophysical properties of backfill
Abstract
The work based on the experimental research of the effect of heat exchange with granular nozzle and phase slip in vapor-liquid mixture allowed to specify the features of the equilibrium velocity of sound in a three-phase system “vapor-liquid-solid particles”. This theoretical model of the equilibrium speed at non-adiabatical conditions found experimental evidence. There are given the results of analytical solution of the problem of periodic thermal influence on the elements of the granular layer.
Izvestiya MGTU MAMI. 2012;6(2-4):47-55
47-55
Prospects for improving photocolorimetric gas analyzerers
Abstract
The paper provides an overview of photocolorimetric method of air analysis and the classification and analysis of photocolorimetric gas analyzers according to the type of sensitive element, the description of their advantages and disadvantages. The operating principle of tape photocolorimetric gas analyzer is considered. There are offered a variety of possible technical solutions to improve photocolorimetric gas analyzers.
Izvestiya MGTU MAMI. 2012;6(2-4):55-58
55-58
59-62
Methods of intensification of the processes of crystallization in cryogranulation of liquid suspensions in liquid nitrogen. The research of destinations of front changing of boiling regimes
Abstract
The paper presents methods of intensification of the processes of crystallization during cryogranulation. The calculations of the block length of the machine for cryogranulation are made. There are researched the destinations of front changing boiling regimes from the damped film to decaying bubble.
Izvestiya MGTU MAMI. 2012;6(2-4):62-67
62-67
The study of flow structure in the field of centrifugal forces
Abstract
The paper presents the results of experimental research of aerodynamic structure of the gas flow inside a centrifugal separator. There is established the influence of a degree of spin flow at the inlet on the relative irregularity of the flow in height and cross-section of the unit.
Izvestiya MGTU MAMI. 2012;6(2-4):67-73
67-73
Instrumentation and methodological support of determination of waterand fat-soluble antioxidants
Abstract
The paper describes the selection of optimal operating conditions of amperometric detector work for determination of water-soluble antioxidants, modernization of the instrument for analysis of fat-soluble antioxidants. The authors developed the design of the layout of the first domestic universal multi-purpose portable liquid chromatograph. This allowed for the first time to measure the total content of antioxidants in meat, fish and dairy products; expand the data content of antioxidants by adding sections: spices and seasonings, meat, fish and dairy products; to examine the question of the optimal balance in the human diet of water - and fat-soluble antioxidants.
Izvestiya MGTU MAMI. 2012;6(2-4):73-79
73-79
The use of pulse-width modulation for reduction the amplitude noise on the example of the contact conductivity meter
Abstract
The analysis on the possibility of using pulse width modulation to control the amplitude noise on the example of the contact conductivity meter is made. There were built various models measuring cell of the device and simulated the effects of amplitude noise on the measurement.
Izvestiya MGTU MAMI. 2012;6(2-4):79-81
79-81
The laser-spark method of control of urban soils on the content of heavy metals
Abstract
The laser-spark-premium method for determination of heavy metals in urban soils is considered in the paper. Optimal hardware parameters and formulation of the soil samples for heavy metals were found. There have been developed the algorithm and MPT which allowed to increase the number of determined TM in one sample, and to expand the range of measurement and reduce the detection limit.
Izvestiya MGTU MAMI. 2012;6(2-4):81-85
81-85
The cultivation of the yeast Phaffia rhodozyma with constant or periodic light
Abstract
The paper investigates the influence of constant and periodic lighting fluorescent lamps in the range from 0 to 9 500 Lux for the growth of biomass of culture Phaffia rhodozyma and synthesis of astaxanthin at periodic cultivation in the bioreactor. It is established that with the light of 7500 Lux periodic mode of action of light allows culture to synthesize the same astaxanthin as with a constant illumination. It is shown that the constant exposure to the light of 7500 Lux leads to a greater increase in the phase lag of the biosynthesis of astaxanthin and biomass growth than periodic light.
Izvestiya MGTU MAMI. 2012;6(2-4):86-89
86-89
89-92
The study of the performance of the combined points for the processes of cleaning gases in biofilters
Abstract
The article considers the process of cleaning air from toxic organic compounds in the biofilter. A new type of combined nozzles and results of experimental study of its work is presented. Recommendations for use of the combined space in the biofilters are offered.
Izvestiya MGTU MAMI. 2012;6(2-4):92-96
92-96
Modeling of electromagnetic field in the resonator with regard to the measurement of the fuels water cut
Abstract
In this article results of an experimental study of cylindrical cavity resonator with a thin layer of humidity on the lower end wall are presented. Analysis of the known methods was carried out using simulation by finite element method in the system ANSYS. The practical application of research results could be a detection of precipitated water in aviation kerosene.
Izvestiya MGTU MAMI. 2012;6(2-4):97-101
97-101
Use of distillery bards as raw materials to produce high-protein feed products
Abstract
The paper describes the methods of processing components of distillery bards for fermentation media (and the growth of carbohydrate). There are presented the results of experiments on cultivation in these environments yeast of Phaffia type, the producer of the Supreme carotenoids of astaxanthin
Izvestiya MGTU MAMI. 2012;6(2-4):101-106
101-106
The use of gum arabic in the washing compositions of surfactants
Abstract
Gum Arabic (GA) is a unique polysaccharide which has excellent emulsifying and encapsulating properties. GA is very widely used in food and non-food industry. Emulsive stability depends on concentration, temperature as well as on homogenization time. Thus the priority task of this research work is to improve the quality of final products by getting stable emulsions under the conditions that allow to vary the time of homogenization.
Izvestiya MGTU MAMI. 2012;6(2-4):106-109
106-109
110-116
The research on iron removal filters
Abstract
The purpose of this research was the selection of the optimal filtering medium for pressure removal of dissolved iron filters of water conditioning plant. The increase of plant capacity by raising the filtration rate leads to the increase in the pressure drop and reduction the duration of filtration cycle. The aforesaid issue was the cause of studying alternative filtering medium of quartz sand.
Izvestiya MGTU MAMI. 2012;6(2-4):116-121
116-121
Computer management of the quality of anti-icing materials for highways
Abstract
The computer quality management system for the chemical anti-icing materials (AIM) was developed based on the CALS concept. There were carried out researches for the most perspective AIM for the most important quality indicators. Also there was made the estimation of aggression of influence for AIM on constructional materials (steel and concrete).
Izvestiya MGTU MAMI. 2012;6(2-4):121-125
121-125
Expert system for analytical monitoring of high purity organic solvents
Abstract
The authors developed an expert system for selection the analytical equipment and method of analysis of high purity substances (by the example of the assortment of organic solvents). Knowledge bases are developed on the basis of information CALS-technologies and structured by application spheres, analyzed substances, indicators of quality, methods of analysis and analytic devices. In its turn, the knowledge base on the analytical devices is structured in 4 main clusters of quality indicators: the content of the base substance, metal cations, anions and suspended particles.
Izvestiya MGTU MAMI. 2012;6(2-4):125-129
125-129
Intensification of flotation cleaning of oil-contaminated water by the preliminary ultrasound activation reagent
Abstract
The possibilities of practical application of high-intensity ultrasound in conjunction with other physical and chemical methods for cleaning oil-contaminated wastewater. In the course of experimental studies there was found a significant increase in the degree of purification using pre ultrasonic activation reagent. The authors analyzed the mechanism of the obtained effect with respect to a high alumosilitic flocculant - coagulant.
Izvestiya MGTU MAMI. 2012;6(2-4):129-135
129-135
Combined schemes of water treatment systems
Abstract
The article considers the modernization of existing technological schemes. The authors present experimental data on separation of salt solution by electro-membrane method. The variants of combined schemes of treatment of water systems are considered as well.
Izvestiya MGTU MAMI. 2012;6(2-4):135-139
135-139
Dielectric relaxation and structural changes in aqueous solutions of tetromethyl carbamid
Abstract
In this article the authors consider dielectric permittivity of aqueous solutions. The experimental study and calculations of the microwave oven of dielectric properties were executed. The conclusions about structural and kinetic changes of water were determined on the example of tetromethylcarbamid solutions.
Izvestiya MGTU MAMI. 2012;6(2-4):139-143
139-143
Comparison of the effectiveness of immobilization of XYLOTROPHIC basidiomycete on carriers of organic and inorganic origin
Abstract
The article considers the immobilization possibility of mycelium Trametes hirsuta 56 on organic and inorganic carriers in dynamic and static modes. The authors searched the influence of used carriers on the synthesis of the extracellular enzyme.
Izvestiya MGTU MAMI. 2012;6(2-4):143-147
143-147
Behaviour modelling of dispersed substances nanoscale level in a special channel dies
Abstract
The article discusses the main methods for organization of modeling objects of nanoscale level. There are performed the researches and developed the method of engineering calculation of the process of compaction of granular formulations in geometrically complex die.
Izvestiya MGTU MAMI. 2012;6(2-4):148-152
148-152
Vacuum-evaporative process of water cooling together with counter flow
Abstract
The effects of vacuum-evaporation with convective counter flow of air for water cooling are considered in the article. There was performed a comparison with the method of cooling water in the cooling towers. The benefits of the method are revealed. The block-schema of the experimental stand is presented as well as the analytical analysis. Analytical and experimental results are presented in graph form.
Izvestiya MGTU MAMI. 2012;6(2-4):152-155
152-155
Mathematical support and software for the durability calculation of an expansion joint bellows
Abstract
In this article there are stated the method and algorithm of numerical analysis of the intense-deformed condition of expansion joint bellows with its realization in the form of software. There is given an example of the calculation and the optimum design of the expansion joint bellows.
Izvestiya MGTU MAMI. 2012;6(2-4):155-161
155-161
162-166
Estimate of the factor of safety of convex bottoms under uniform internal pressure
Abstract
This paper covers the derivation of engineering formulas in the State Standard Specification 14249-89 for the calculation of elliptical bottoms under uniform internal pressure, their numerical modeling of the stress-strain state by the finite element method and the comparative evaluation of the safety factor adopted in the State Standard Specification 14249-89 with the results of the experiment.
Izvestiya MGTU MAMI. 2012;6(2-4):166-169
166-169
169-173
173-177
Thermodynamics in weakly-dissipative Kolmogorov-Arnold-Moser theory
Abstract
In the article there are presented the results of the numerical data calculation of the basic thermodynamic variables such as dependence of the thermodynamic potentials from the temperature and pressure, and the geometric characteristics of the dynamics like the center of mass of trial particle. The dynamics is described by a simple Euler discretization of family of vector fields arising in the Bogdanov-Takens bifurcation.
Izvestiya MGTU MAMI. 2012;6(2-4):177-184
177-184
The role of environmental factors in vasoneurosis
Abstract
Environmental degradation in large cities is a factor that provokes the dysfunction of autonomic regulation. Nitrogen oxide and carbon monoxide have a leading role, they have intermittent mode of action. The author examined the types of vegetation to ensure the physical, emotional and intellectual activities and deals with how to correct violations.
Izvestiya MGTU MAMI. 2012;6(2-4):184-190
184-190
190-197
New application of secondary polymer composites
Abstract
The authors carried out a number of experiments on the influence of the chemical nature and composition of polymer blends based on recycled packaging materials (such as polyolefins and waste of the packaging "TetraPak"), temperature and other parameters of their co-processing with some dispersed fillers on the physical, chemical and physico-mechanical properties of the compounds. The resulting samples of composites based on packaging waste, were studied for the absorption of oil. An optimum volume ratio of oil and sorbent was obtained. There are discussed possible applications of new low-cost sorbents.
Izvestiya MGTU MAMI. 2012;6(2-4):197-201
197-201
201-205
205-209
Evaluation of the conditions of oil seepage into the ground after corrosion damage of a tank covering
Abstract
The authors suggest the methodology of the evaluation of a leakage of a liquid under pressure of the jet as well as gravity filtration. There are obtained the expressions relating the flow rate of filtered fluid through the ground to the size of accumulating “lens” accumulated under a tank. The authors obtained also the calculation results of the intensity of infiltration of oil from damaged tanks in soils with different characteristics.
Izvestiya MGTU MAMI. 2012;6(2-4):209-219
209-219
Way to assess the possibility of spontaneous combustion of microbiological products at storage
Abstract
In the article the authors show the possibility of spontaneous combustion of microbiological products at storage. There is presented the methodology of calculation of spontaneous combustion conditions of the stored inventory. The authors suggest the algorithms to determine safe conditions for storing. The basic directions of activities for the prevention of spontaneous combustion in the microbiological at utility facilities are also presented.
Izvestiya MGTU MAMI. 2012;6(2-4):219-228
219-228
Way to calculate the time to spontaneous combustion of deposits substances having unbalanced heat exchange with the environment
Abstract
The authors developed the technique, allowing to calculate the induction period of thermal spontaneous combustion of deposits having unbalanced heat exchange. Using it, it is possible to determine the thickness of the fire-prone and fire-resistant deposits on the surface of various technological equipment and the time to spontaneous combustion deposits in the given conditions.
Izvestiya MGTU MAMI. 2012;6(2-4):228-235
228-235
235-241
The calculation ofthe statistical characteristics ofassessmentpoint on theEarth's surface, obtained byone-coordinatedirection obtainedby the one-coordinate DF from the aircraft
Abstract
In the paper there were foundanalytical expressionsfor the calculation ofthe linear approximation inmeasurement of geographical coordinates errorestimatesandthe correlation matrix ofpoints on thesurface of the Earthaccording to theone-coordinateof bearing.The algorithm of recursive refinement of coordinates in the process of obtaining new measurements is proposed.
Izvestiya MGTU MAMI. 2012;6(2-4):242-249
242-249
Kinematic calculation ofsix-memberedlinkage using theanalytical method
Abstract
In this article the possibility of analytical calculation of kinematic parameters of thehinged laddermechanisms of the 2-nd class and 2-nd order with the use of analytical geometrybasis in the plane and differential calculus is considered.Derived analytical dependences for determination of the linear and angular velocities and accelerations points and links of six-linkedlever mechanism.Examples of graphs, obtained with the use of the calculation of the mathematical programs MathCad 14 are introduced.
Izvestiya MGTU MAMI. 2012;6(2-4):249-252
249-252
Kinetostaticcalculation of six-linked lever mechanismusingtheanalyticalmethod
Abstract
The paper considers the possibility of analytical determination of multi-linked lever mechanism’s reaction of the 2-nd class and 2-nd order on the basis of kinetostatics. There were derived analytical dependences for determination of the reactions ofsix-linked lever mechanism kinematic pairs. Examples of graphs, obtained with the use of the calculation of the mathematical programs MathCad 14 are provided.
Izvestiya MGTU MAMI. 2012;6(2-4):253-259
253-259
259-262
Protective antimicrobial coverings containing amber and propolis
Abstract
Compositions in the form of pencils and varnishes containing amber and propolis may be used for creation of protective films to prevent the growth and development of the fungusesAspergillusniger and Penicillumculmorum,bacterias Bacillus subtilis, Bacillus turengensis, and other commonly encountered on many surfaces in residential and industrial areas, in bio-filters, in hermetic premises, including space stations. Pencils are compact, hygienic and easy to use, but the protective properties of varnishes are more pronounced. Fast preparation of compositions containing natural resinous substances with antimicrobial properties is possible by using the low-frequency ultrasound.
Izvestiya MGTU MAMI. 2012;6(2-4):262-269
262-269
The impact of stress on the culture of tissue Arabidopsis thaliana ininvitroconditions
Abstract
The paper is devoted to the study of the influence of stress factors on the culture of tissue A. thaliana and evaluation of the sustainability of culture under the influence of copper ions and high temperature. Dose curves based on the obtained results are made.
Izvestiya MGTU MAMI. 2012;6(2-4):269-272
269-272
Phytotoxicity assessment of copper and getting stress-resistant dicotyledonous
Abstract
The phytotoxicity of copper for whole plants and callus cultures of plurannual flax (LinumperenneL.) and Chrysanthemumcarinatum L. was estimated. Selective concentration of copper for these plants was determined. As well as the schemes of selection for resistance to copper regenerated plants were discribed.
Izvestiya MGTU MAMI. 2012;6(2-4):273-276
273-276
276-279
Enhancing the stability of bentgrass (AgrostisstoloniferaL.) to salts of cadmium
Abstract
In the paper there is developed a biotechnological method for increasing the stability of urban turf – bentgrass, to ions of cadmium in the environment. The following scheme was chosen selection – culturing callus on MS medium supplemented with 10 mg Cd / l for two passages, regeneration on MS medium supplemented with 20 mg Cd / l, rooting on MS medium with cadmium concentration of 30 mg / l. Under selective conditions there were received 130 regenerants of bentgrass, 58 of which were rooted in the soil. Resistance to cadmium was kept at one of the seeds tested regenerants in four generations.
Izvestiya MGTU MAMI. 2012;6(2-4):279-283
279-283
283-286
286-289
The innovative research works of the Scientific and Technical Center "Technique of low temperatures"
290-295
295-298
Study of physico-chemical and structural processes in obtaining of aluminosilicate glass ceramics
Abstract
A comprehensive study of changes in structural and physicochemical properties of aluminosilicate glass-ceramics during obtaining process. For this work authors use the data obtained by the differential scanning calorimetry, infrared and Raman spectroscopy, electron paramagnetic resonance, X-ray diffraction analysis, they also studied in detail the fractal-morphological characteristics of the surface structure obtained by electron microscopy images.
Izvestiya MGTU MAMI. 2012;6(2-4):299-304
299-304
Computer simulation of fuzzy equation of transfer of radioactive pollution
Abstract
The paper deals with the mathematical model and computer software for solution of fuzzy transfer equation for modeling of distribution of radioactive pollution into environment under destruction of radioactive waste storage with the interval uncertainty of a number of physico-chemical parameters of distribution of radioactive contamination (rate of rise of groundwater from radioactive waste storage and radioactive pollution diffusion coefficients in the geological layer).
Izvestiya MGTU MAMI. 2012;6(2-4):305-308
305-308
The dependence of the demographic situation of migration flow showed by the example of the three simulated countries with different social and economic indicators
Abstract
The authors developed the mathematical and computer models to simulate migration flows between countries. The main control parameters of the model are the following socio-economic indicators: levels of health care, education and environment, as well as the level of technological development. The model can be offered for monitoring, forecasting and management of migration flows.
Izvestiya MGTU MAMI. 2012;6(2-4):308-312
308-312
System of decision making support based on the fuzzy algorithm for selection of a supplier in the supply chain
Abstract
The authors developed the system for support of decision making for the rational selection of the supplier in the supply chain, using the analytic hierarchy process and the algorithm based on the operations of fuzzy sets theories. The functioning of the decision making support system has been verified experimentally on the real accounting and statistics data. The results of numerical experiments confirm the efficiency of the algorithm for making logistics management solutions.
Izvestiya MGTU MAMI. 2012;6(2-4):312-318
312-318
Mathematical model of heat network and development of recommendations for calculation of the efficiency for arbitrary temperature graphics
Abstract
The authors offer a generalized heat network mathematical model, on which basis it is possible to study the heat network for various methods of regulation, including quantitative and qualitative regulation of heat load. The work allowed to obtain the equation for calculating the efficiency of thermal network in analytical form which gives the opportunity to design organizations optimize the length of transmission of a heat-carrier, to determine the optimum flow of hot water in the pipeline and its diameter.
Izvestiya MGTU MAMI. 2012;6(2-4):318-324
318-324
System of optimal control the cellulases biosynthesis
Abstract
The production of enzymes from the waste of food production is of great ecological importance, but there are some difficulties connected with the instability of the raw materials used and the difficulty of operational control of the fermentation process. The paper proposes to use periodically updated mathematical biosynthesis model of the enzyme to determine the best moment of the process cessation.
Izvestiya MGTU MAMI. 2012;6(2-4):324-326
324-326
Improvement of the maintenance process of highly qualified personnel quality in the university
Abstract
The article offers the directions to increase quality of specialists training on the basis of introduction the special staff preparation and information and analytical system of the supporting processes organization of training the top skills in higher education institution.
Izvestiya MGTU MAMI. 2012;6(2-4):326-329
326-329
329-332
Water supply system regulation in towns of England in the Tudor period
Abstract
This article considers the methods and techniques of urban water supply regulation in England in the late XV - beginning of the XVII centuries, as one of the most important aspects of municipal infrastructure development. Changes that have occurred in the field of water supply system in the Tudor period, make a new look at the question of the role and place of municipal authorities in the formation of public utilities.
Izvestiya MGTU MAMI. 2012;6(2-4):332-337
332-337