Research into aero acoustic characteristics of two-row impellers of the axial compressor
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 2, Issue 8
Abstract
<p>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.</p><p>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.</p>
Authors and Affiliations
Ekaterina Doroshenko, Yuriy Tereshchenko, Ivan Lastivka, Inna Kudzinovs'ka
Keywords
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- EP ID EP527903
- DOI 10.15587/1729-4061.2018.125697
- Views 62
- Downloads 0
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