Vol 8, No 4-1 (2014)

The article considers development of the output axial-radial diffuser of automotive gas-turbine plant power turbine. The completed mathematical gas flow study optimized the diffuser geometry, which improves the power efficiency of stage power turbine, helping to achieve high efficiency of a microturbine.

The article noted the key indicators of microturbine energy systems that can ensure competitiveness in the global market for distributed power supply. Based on the need to achieve these competitive performance there are justified demands for the compressor and turbine.

The article presents the results of development and practical application of the methods of designing efficient supercharging systems for internal combustion engines for various purposes.

The article details the test-bench and control methods. The authors examine the operation of the controller "BR 5pp520" and input-output system, connected to it by internal bus X2X and programming in Automation studio. The paper describes the algorithm of the program to stabilize the rotor speed by controlling air supply actuator and temperature stabilization program algorithm for gases in turbocharger inlet.

This paper considers the possibility of usage of energy-accumulating substances (EAS) as alternative fuel for transport and stationary gas turbine engines and power stations. Three-component alloys Si, Al and Fe are studied as industrial EAS. The study determined the heats of combustion and adiabatic temperatures of EAS combustion in the environment of superheated steam at different values of oxidant excess coefficient. Composition of condensed combustion products is defined for various fractional composition of EAS. It is also determined the completeness of combustion EAS.

The article contains results the analysis of the effect of humidity on the work of the turbo expander

The article provides an overview of bearings used in high-speed turbomachines. It is shown that for low-power turbine-generator units in stationary or transport variant the most promising is use of flap gas-dynamic bearing, it is shown a comparison of different designs of flap gas dynamic bearings. The most detailed characteristics were given for flap gas-dynamic bearing with overlapping flaps developed in National Research University Moscow Power Engineering Institute, there are described the methods of their experimental study, shown operating and dynamic characteristics, as well as the range of products.

On the elaborate dynamic model of truck with the specified presentation of elements cabin suspensions are investigated the influence of stabilizer cabin suspension and of stiffness bushing arms cabin suspension on cabin vibration loading with random external road forcing.

The article indicates the problem leading to the need for target setting for synthesis of algorithms for automatic robust control of technology systems. The paper considers one of the existing formulations of this problem and describes recommendations for its improvement in different approaches to the formalization of the set of typical operating situations for an object of controlling.

The paper presents the results of mathematical modeling of curvilinear motion of a triaxial allwheel drive automobile "Gidrohod-49061" with the full-flow without the use of automatic adaptive control system with locked interaxle drive and symmetrical turn of steering wheels of front and rear axles. In this case, the authors analyze the impact of uneven weight distribution of the car between its axles on the parameters characterizing the performance of the drive wheels and hydraulic drives included in the hydrostatic transmission

The authors propose unified terms related to general concepts, frequently used in the theories of automobile, tractor, high speed wheeled and tracked transport-traction vehicles.