Research into aero acoustic characteristics of two-row impellers of the axial compressor

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.125697

Keywords:

aero acoustic characteristics, two-row impeller, pressure, loss of full pressure

Abstract

We have conducted numerical simulation of current in the axial impellers with a single-row and a two-row geometrically equivalent blade crowns with a density of blade crowns over average radius of 1...2.5. The pressure characteristics of impellers obtained at q(λ)=0.45…0.8 show that using the two-row impellers can improve the pressure of a stage over the entire range of operation. Under the flow-around modes that correspond to the maximum pressure, the degree of pressure rise increases by 10.5 %. The research results showed that the two-row impellers demonstrate the higher level of losses compared with the level of losses in the equivalent single-row impellers. We have obtained results of research into aero acoustic characteristics of subsonic two-row impellers of the axial compressor.

The research results showed that the use of two-row blade crowns in the impeller makes it possible to reduce the level of acoustic pressure in the range of operation q(λ)=0.45…0.8 by 0.5 dB to 3.2 dB at a density of blade crowns over average radius of 1...2.5. The replacement of a single-row blade crown in the impeller of a stage of the axial compressor with the equivalent two-row blade crown could ensure the enhancement of aerodynamic loading on the stage and reduce acoustic emission of the compressor.

Author Biographies

Ekaterina Doroshenko, National Aviation University Kosmonavta Komarova ave., 1, Kyiv, Ukraine, 03058

PhD

Department of aviation engine

Yuriy Tereshchenko, National Aviation University Kosmonavta Komarova ave., 1, Kyiv, Ukraine, 03058

Doctor of Technical Sciences, Professor

Department of aviation engine

Ivan Lastivka, National Aviation University Kosmonavta Komarova ave., 1, Kyiv, Ukraine, 03058

Doctor of Technical Sciences, Professor, Head of Department

Department of higher mathematics

Inna Kudzinovs'ka, National Aviation University Kosmonavta Komarova ave., 1, Kyiv, Ukraine, 03058

PhD, Associate Professor

Department of higher mathematics

References

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Published

2018-03-13

How to Cite

Doroshenko, E., Tereshchenko, Y., Lastivka, I., & Kudzinovs’ka, I. (2018). Research into aero acoustic characteristics of two-row impellers of the axial compressor. Eastern-European Journal of Enterprise Technologies, 2(8 (92), 20–24. https://doi.org/10.15587/1729-4061.2018.125697

Issue

Vol. 2 No. 8 (92) (2018): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2018 Ekaterina Doroshenko, Yuriy Tereshchenko, Ivan Lastivka, Inna Kudzinovs'ka

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