Numerical investigation of impeller-diffuser interaction in a centrifugal compressor

LIU Yang-wei; LIU Bao-jie

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Numerical investigation of impeller-diffuser interaction in a centrifugal compressor

更新时间：2026-07-07

- Numerical investigation of impeller-diffuser interaction in a centrifugal compressor
- Vol. 24, Issue 12, (2009)
- 作者机构：
  
  北京航空航天大学能源与动力工程学院航空发动机气动热力科技重点实验室,北京,100191
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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LIU Yang-wei, LIU Bao-jie. Numerical investigation of impeller-diffuser interaction in a centrifugal compressor[J]. 2009, 24(12).
DOI：

LIU Yang-wei, LIU Bao-jie. Numerical investigation of impeller-diffuser interaction in a centrifugal compressor[J]. 2009, 24(12). DOI：

摘要

采用定常和非定常数值模拟技术

研究了某跨声离心压气机级内的复杂流动

分析了叶轮与径向扩压器之间的非定常相互作用.结果表明

扩压器的势干扰使叶轮出口静压发生周期性地变化

引起叶轮后部负荷、叶尖泄漏和损失等也产生周期性地变化

影响范围达30%流向弦长.叶轮出口流场的周向不均匀性及非定常性使扩压器进口参数发生周期性的变化

导致扩压器负荷、总压恢复系数分布呈现出较强的非定常性

影响范围贯穿整个扩压器通道.

Abstract

Steady and unsteady simulations were conducted to investigate the complicated flow in a transonic centrifugal compressor with splitter blade.Results from the steady and unsteady simulations were compared and the interactions between impeller and diffuser were studied in detail.The results indicate that the impeller/diffuser interaction can affect a range of 30% impeller chord for impeller trailing edge on impeller performance and whole chord length on diffuser performance.The potential effects of the diffuser caused an unsteady pressure disturbance for the impeller exit

leading to the unsteadiness of impeller load

tip leakage flow and losses.While the unsteadiness of impeller exit flow caused periodical variation of inlet flow conditions for the diffuser

and the inlet flow angle was found to be the most significant parameter in setting diffuser performance

resulting in significant unsteadiness of blade load and total pressure recovery coefficient.

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Related Author

LIU Yang-wei

HUANG Wei-bing

LIU Bao-jie

CHEN Jie

HE Min-xiang

HUANG Guo-ping

XIAO Da-qi

ZHENG Yun

Related Institution

National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics

Customer Representative of Shenyang Liming Engine Manufacturing Corporation

Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics

Aeroengine Numerical Simulation Research Center, School of Jet Propulsion,Beijing University of Aeronautics and Astronautics

National Key Laboratory of Science and Technology on Aero-engine Aero-thermodynamics,School of Jet Propulsion, Beijing University of Aeronautics and Astronautics

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