This is Part I of a two-part paper documenting the development of a novel asymmetric flow control method to improve the stability of a high-pressure-ratio turbocharger centrifugal compressor. Part I focuses on the nonaxisymmetrical flow in a centrifugal compressor induced by the nonaxisymmetrical geometry of the volute while Part II describes the development of an asymmetric flow control method to avoid the stall on the basis of the characteristic of nonaxisymmetrical flow. To understand the asymmetries, experimental measurements and corresponding numerical simulation were carried out. The static pressure was measured by probes at different circumferential and stream-wise positions to gain insights about the asymmetries. The experimental results show that there is an evident nonaxisymmetrical flow pattern throughout the compressor due to the asymmetric geometry of the overhung volute. The static pressure field in the diffuser is distorted at approximately 90 deg in the rotational direction of the volute tongue throughout the diffuser. The magnitude of this distortion slightly varies with the rotational speed. The magnitude of the static pressure distortion in the impeller is a function of the rotational speed. There is a significant phase shift between the static pressure distributions at the leading edge of the splitter blades and the impeller outlet. The numerical steady state simulation neglects the aforementioned unsteady effects found in the experiments and cannot predict the phase shift, however, a detailed asymmetric flow field structure is obviously obtained.
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March 2013
Research-Article
Stability Improvement of High-Pressure-Ratio Turbocharger Centrifugal Compressor by Asymmetric Flow Control—Part I: Non-Axisymmetrical Flow in Centrifugal Compressor
Xinqian Zheng,
Yangjun Zhang,
Yangjun Zhang
State Key Laboratory of Automotive Safety and Energy
Tsinghua University
,Beijing 100084
, China
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Hideaki Tamaki,
Hideaki Tamaki
Turbo Machinery and Engine Technology Department,
IHI Corporation,
Yokohama, 235-8501,
IHI Corporation,
Yokohama, 235-8501,
Japan
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Joern Huenteler,
Joern Huenteler
RWTH Aachen University,
Aachen 52056, Germany
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Zhigang Li
Zhigang Li
Beijing Special Vehicle Institute,
Beijing 100072
, China
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Xinqian Zheng
e-mail: zhengxq@tsinghua.edu.cn
Yangjun Zhang
State Key Laboratory of Automotive Safety and Energy
Tsinghua University
,Beijing 100084
, China
Hideaki Tamaki
Turbo Machinery and Engine Technology Department,
IHI Corporation,
Yokohama, 235-8501,
IHI Corporation,
Yokohama, 235-8501,
Japan
Joern Huenteler
RWTH Aachen University,
Aachen 52056, Germany
Zhigang Li
Beijing Special Vehicle Institute,
Beijing 100072
, China
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received April 26, 2010; final manuscript received December 26, 2011; published online November 1, 2012. Assoc. Editor: Michael Casey.
J. Turbomach. Mar 2013, 135(2): 021006 (9 pages)
Published Online: November 1, 2012
Article history
Received:
April 26, 2010
Revision Received:
December 26, 2011
Citation
Yang, M., Zheng, X., Zhang, Y., Bamba, T., Tamaki, H., Huenteler, J., and Li, Z. (November 1, 2012). "Stability Improvement of High-Pressure-Ratio Turbocharger Centrifugal Compressor by Asymmetric Flow Control—Part I: Non-Axisymmetrical Flow in Centrifugal Compressor." ASME. J. Turbomach. March 2013; 135(2): 021006. https://doi.org/10.1115/1.4006636
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