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research-article

STALL INCEPTION ANALYSIS OF TRANSONIC COMPRESSORS WITH CHORDWISE AND AXIAL SWEEP

[+] Author and Article Information
Chen He

School of Energy and Power Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China
hechen@buaa.edu.cn

Dakun Sun

School of Energy and Power Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China
sundk@buaa.edu.cn

Xiaofeng Sun

School of Energy and Power Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China
sunxf@buaa.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4038873 History: Received October 22, 2017; Revised November 03, 2017

Abstract

This paper concentrates on the stall inception analysis of transonic compressors with chordwise and axial sweep. A new prediction approach of stall inception is developed based on global stability analysis and immersed boundary theory, which makes it possible to takes both the concrete blade geometry and complicated base flow into consideration. The prediction of stall inception boils down to an eigenvalue problem. Spectral collocation method is adopted to discretize the eigenvalue equations and the eigenvalues are solved by using singular value decomposition method. The developed prediction approach is validated on two different typical transonic compressors, a single stage compressor and an isolated-rotor compressor, which shows a good agreement with the experimental data. The latter is adopted as a baseline rotor for the investigation of chordwise and axial sweep. By adjusting the stacking line of the baseline rotor, a series of swept rotors are modelled and the stall inception behavior of them are predicted by using the developed approach. The comparison of stall inception behaviors between these rotors is presented, and in combination with steady flow analyses, the effects of sweep features on the stall inception in transonic compressors are discussed.

Copyright (c) 2017 by ASME
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