Özet:

We performed numerical simulation of the current in a stage of the axial compressor with an annular gas injection before the impeller. The gas-dynamic action was studied during operation of the stage on the verge of detachment. The annular injection was carried out at several fixed values of injection angle γ in the range from 5º to 90º. The research results showed that the gas-dynamic action on a current makes it possible to improve aerodynamic characteristics of the stage of an axial compressor. The gas-dynamic action by annular injection on the flow in a stage of the axial compressor makes it possible to extend the range of detachment-free flow-around. The level of flow non-uniformity after the impeller and the guide device has decreased.Results of the calculation study showed that at injection angles γ>50º the gas-dynamic action leads to an increase in the level of losses in the impeller At injection angles γ≤50º, one observes a positive effect. A total pressure loss coefficient in the impeller decreases from ξ=0.08 to ξ=0.03…0.005. At the rational values of intensity of the gas-dynamic action on the flow a degree of pressure increase in the stage grows from π=1.08 to π=1.093 Author Biographies Yuriy Tereshchenko, National Aviation University Kosmonavta Komarova ave., 1, Kyiv, Ukraine, 03058 Doctor of Technical Sciences, Professor Department of aviation engine  

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