Effect of bleed on efficiency evaluation of high pressure compressor

CHEN Yunyong; MA Changyou; SUN Zhenyu; CHEN Zhilong

doi:10.11729/syltlx20200097

Volume 35 Issue 2

Apr. 2021

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Journal of Experiments in Fluid Mechanics > 2021 > 35(2): 43-49. > DOI: 10.11729/syltlx20200097

CHEN Yunyong, MA Changyou, SUN Zhenyu, CHEN Zhilong. Effect of bleed on efficiency evaluation of high pressure compressor[J]. Journal of Experiments in Fluid Mechanics, 2021, 35(2): 43-49. DOI: 10.11729/syltlx20200097

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Effect of bleed on efficiency evaluation of high pressure compressor

AECC Shanghai Commercial Aircraft Engine Manufacturing Co., Ltd., Shanghai 201306, China

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Received Date: August 01, 2020
Revised Date: September 14, 2020

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Abstract

On the basis of summarizing the differences and correlations between temperature rise efficiency and torque efficiency, two kinds of isentropic efficiency evaluation methods for the high pressure compressor with inter stage bleed are studied in this paper. The influence of inter stage bleed parameters on the two isentropic efficiency corrections is discussed, and the experimental verification is carried out. The results show that: the torque efficiency is always lower than the temperature rise efficiency due to the mechanical transmission loss of the compressor; the temperature rise efficiency of the compressor before and after the correction of the inter stage bleed parameters has no significant difference, and the variation range is within ±0.5%; considering the correction of inter stage bleed parameters, the torque efficiency of the compressor can be significantly reduced, but the relative decrease is not more than the total bleed rate, and the reduction degree is related to the bleed rate and the stage position where the bleed is located; when the inter stage bleed with a large flow rate is conducted at the inlet side of the compressor, the torque efficiency should be corrected, otherwise the torque efficiency may be greater than the temperature rise efficiency.
- axial flow compressor,
- isentropic efficiency,
- torque efficiency,
- inter-stage bleeding,
- temperature rise efficiency

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