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Research Papers: Flows in Complex Systems

Effects of Stall Precursor-Suppressed Casing Treatment on a Low-Speed Compressor With Swirl Distortion

[+] Author and Article Information
Xu Dong

Co-Innovation Center for Advanced Aero-Engine,
School of Energy and Power Engineering,
Beihang University,
No. 37 Xueyuan Road,
Haidian District,
Beijing 100191, China
e-mail: buaadongxu@buaa.edu.cn

Dakun Sun

Co-Innovation Center for Advanced Aero-Engine,
School of Energy and Power Engineering,
Beihang University,
No. 37 Xueyuan Road,
Haidian District,
Beijing 100191, China
e-mail: sundk@buaa.edu.cn

Fanyu Li

School of Energy and Power Engineering,
Beihang University,
No. 37 Xueyuan Road,
Haidian District,
Beijing 100191, China
e-mail: 00010601@163.com

Donghai Jin

School of Energy and Power Engineering,
Beihang University,
No. 37 Xueyuan Road,
Haidian District,
Beijing 100191, China
e-mail: jdh@buaa.edu.cn

Xingmin Gui

School of Energy and Power Engineering,
Beihang University,
No. 37 Xueyuan Road,
Haidian District,
Beijing 100191, China
e-mail: guixm@buaa.edu.cn

Xiaofeng Sun

Co-Innovation Center for Advanced Aero-Engine,
School of Energy and Power Engineering,
Beihang University,
No. 37 Xueyuan Road,
Haidian District,
Beijing 100191, China
e-mail: sunxf@buaa.edu.cn

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received June 1, 2017; final manuscript received December 25, 2017; published online April 19, 2018. Assoc. Editor: Satoshi Watanabe.

J. Fluids Eng 140(9), 091101 (Apr 19, 2018) (12 pages) Paper No: FE-17-1317; doi: 10.1115/1.4039707 History: Received June 01, 2017; Revised December 25, 2017

Swirl inlet distortion is usually encountered in modern flight vehicles since their inlet ducts usually consist of one or two bends, such as S-inlet duct. An experimental device is first designed to simulate the swirl inlet distortion and then used to test the effectiveness of a novel casing treatment (CT) on a low-speed compressor under the swirl distortions of various intensities. The influences of co- and counter-rotating swirl inlet distortion on the test compressor and the stabilization ability of this novel CT are well demonstrated by the illustrations of static pressure rise curves and efficiency curves. The dynamic prestall pressure signals are also captured to reflect the perturbation energy in the flow field through which the mechanism of the novel CT will be indicated. The relevant results show that counter-rotating swirl distortion in small intensity could increase the compressive ability of compressor with small efficiency loss, and the co-rotating swirl distortion always brings about detrimental effects on compressor performance. At the same time, the distortion of twin swirls can cause nonuniform total pressure profile which can seriously damage the compressor performance. Besides, the stall precursor-suppressed (SPS) CT shows a good capability of stall margin (SM) enhancement no matter what swirl inlet distortions are encountered in the test compressor.

Copyright © 2018 by ASME
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Figures

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Fig. 1

Schematic of test rig and measurement arrangement

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Fig. 2

Schematic and mechanism of SPS casing treatment

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Fig. 3

The inlet flow in a S-inlet duct

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Fig. 4

Swirl inlet distortion generator

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Fig. 5

Inlet total pressure field and Vyz with +5 swirl inlet distortion

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Fig. 6

Inlet total pressure field and Vyz with ±10 swirl inlet distortion

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Fig. 7

The radial distribution of Vyz at vertical circumferential position under four swirl inlet distortions

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Fig. 8

Repetitive results

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Fig. 16

Efficiency curves with ±5/±10 swirl inlet distortion under 80% and 100% design speed

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Fig. 15

Static pressure rise curve with ±5/±10 swirl distortion under 80% and 100% design speed

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Fig. 14

Efficiency curves with +10 swirl inlet distortion under 80% and 100% design speed

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Fig. 13

Static pressure rise curve with +10 swirl distortion under 80% and 100% design speed

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Fig. 12

Efficiency curves with +5 swirl inlet distortion under 80% and 100% design speed

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Fig. 11

Static pressure rise curve with +5 swirl distortion under 80% and 100% design speed

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Fig. 10

Efficiency curves with −5 swirl inlet distortion under 80% and 100% design speed

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Fig. 9

Static pressure rise curve with −5 swirl distortion under 80% and 100% design speed

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Fig. 17

Power spectral density (PSD) of the normalized frequency at 100% design working speed during a period of prestall

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Fig. 18

PSD at 100% design speed with −5 swirl inlet distortion

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Fig. 19

PSD at 100% design speed with +5 swirl inlet distortion

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Fig. 20

PSD at 100% design speed with ±5 swirl inlet distortion

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Fig. 21

PSD at 100% design speed with ±10 swirl inlet distortion

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