叶顶间隙几何不确定性对离心叶轮气动性能的影响

傅珏; 蒋伟; 柳一鸣; 琚亚平; 张楚华

doi:10.7652/xjtuxb201811008

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叶顶间隙几何不确定性对离心叶轮气动性能的影响

更新时间：2025-07-09

- 叶顶间隙几何不确定性对离心叶轮气动性能的影响
- Influence of Tip Clearance Geometrical Uncertainties on the Aerodynamic Performance of Centrifugal Impellers
- 西安交通大学学报 2018年52卷第11期页码：51-57
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
  
  : 2018-04-09。作者简介: 傅珏(1995—),男,硕士生;琚亚平(通信作者),女,副教授。基金项目: 国家重点研发计划资助项目(2016YFB0200903);国家自然科学基金资助项目(51776154);教育部重大科技基础设施培育计划课题
- DOI：10.7652/xjtuxb201811008
  中图分类号： TH452
- 网络首发：2018-11-10，
  
  纸质出版：2018
- 稿件说明：
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傅珏, 蒋伟, 柳一鸣, 等. 叶顶间隙几何不确定性对离心叶轮气动性能的影响[J]. 西安交通大学学报, 2018,52(11):51-57.

Influence of Tip Clearance Geometrical Uncertainties on the Aerodynamic Performance of Centrifugal Impellers[J]. 2018, 52(11): 51-57.
傅珏, 蒋伟, 柳一鸣, 等. 叶顶间隙几何不确定性对离心叶轮气动性能的影响[J]. 西安交通大学学报, 2018,52(11):51-57. DOI： 10.7652/xjtuxb201811008.

Influence of Tip Clearance Geometrical Uncertainties on the Aerodynamic Performance of Centrifugal Impellers[J]. 2018, 52(11): 51-57. DOI： 10.7652/xjtuxb201811008.

摘要

为了揭示受叶顶间隙几何不确定性影响的离心叶轮气动性能和内部流场变化规律

采用非嵌入式多项式混沌(NIPC)法并结合计算流体力学方法

以Krain离心叶轮为例

研究了叶顶间隙服从高斯分布时的叶轮效率、压比性能统计变化规律

并从叶轮出口流动不均匀性、相对马赫数分布、载荷分布等角度探究其物理机制。结果表明:不同流量工况下

Krain叶轮效率和压比的不确定带大小相当; 小流量工况下

叶轮出口流动对叶顶间隙几何不确定性的敏感度较强; 大流量工况下

叶轮进口及吸力面附近流动对叶顶间隙几何不确定性的敏感程度较强。研究结果有利于深刻认识叶顶间隙几何不确定性对离心叶轮气动性能和内部流场的影响

同时为深入开展流体机械不确定性流动分析研究提供了一定的理论指导。

Abstract

In order to reveal the variations of aerodynamic performance and the flow field of centrifugal impeller due to tip clearance geometrical uncertainties

this paper combines the non-intrusive polynomial chaos(NIPC)method and the fluid computational dynamics method to conduct the flow uncertainty analysis on the Krain impeller. The statistical variation rules of the impeller efficiency and pressure ratio are investigated under the assumption that the tip clearance is subject to a Gaussian distribution. The physical mechanisms are explored relating to the non-uniformity of the impeller discharge flow

the relative Mach number distribution and load distribution. The results show that the uncertainty intervals of impeller efficiency and pressure ratio are almost the same under different flow conditions. At low flow rates

the impeller discharge flow is more sensitive to the tip clearance geometrical uncertainties

while the flow near the impeller inlet and suction surface is more sensitive at high flow rates. The present work is beneficial to the in-depth understanding of the influence of tip clearance geometrical uncertainties on the aerodynamic performance and internal flow field of centrifugal impellers

providing a theoretical foundation for the research on the flow uncertainty analysis of fluid machinery.

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references

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