Numerical Investigation on the Influence of Blade Profile Deviation on the Performance of Centrifugal Impellers

FAN Hongzhou; LEI Weipeng; WANG Zhiheng; XI Guang

doi:10.7652/xjtuxb202509019

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Numerical Investigation on the Influence of Blade Profile Deviation on the Performance of Centrifugal Impellers

更新时间：2025-09-11

- Numerical Investigation on the Influence of Blade Profile Deviation on the Performance of Centrifugal Impellers
- Journal of Xi’an Jiaotong University Vol. 59, Issue 9, Pages: 197-208(2025)
- 作者机构：
  
  西安交通大学能源与动力工程学院， 710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202509019
  CLC： TK05
- Received：20 January 2025，
  
  Online First：13 June 2025，
  
  Published：10 September 2025
- 稿件说明：
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FAN Hongzhou, LEI Weipeng, WANG Zhiheng, et al. Numerical Investigation on the Influence of Blade Profile Deviation on the Performance of Centrifugal Impellers[J]. Journal of Xi’an Jiaotong University, 2025, 59(9): 197-208.
DOI：

FAN Hongzhou, LEI Weipeng, WANG Zhiheng, et al. Numerical Investigation on the Influence of Blade Profile Deviation on the Performance of Centrifugal Impellers[J]. Journal of Xi’an Jiaotong University, 2025, 59(9): 197-208. DOI： 10.7652/xjtuxb202509019.

摘要

为研究叶型轮廓度偏差对离心叶轮性能的影响，以Krain叶轮为研究对象，通过构建实际加工中的叶型偏差模型，研究了叶型局部及全局偏差对叶轮性能的影响。针对叶型局部偏差，分析了不同弦长位置等厚轮廓度偏差对叶轮性能的影响；在对性能影响最显著的弦长位置，研究了不同偏差对叶轮性能的影响规律。针对叶型全局偏差，分别探讨了轮廓度及扭转偏差对叶轮性能的影响。数值结果表明：靠近前缘的局部偏差对叶轮性能影响最大，且吸力面偏差与叶轮性能变化存在对应关系，吸力面先过切后欠切恶化了叶轮性能，吸力面先欠切后过切优化了靠近前缘叶片的曲率变化，增大了流道易产生阻塞的通流面积，进而提升了叶轮性能，特别在大流量工况，等熵效率提升1.5%，阻塞流量增大0.6%。叶片全局轮廓度及扭转偏差分别通过改变整个流道的通流面积及叶片进出口安装角影响了叶轮性能，设计工况下，全局负轮廓度、正扭转偏差总压比最大提升了1.2%、1.4%。该研究工作为离心叶轮的加工制造及叶型优化提供了有益参考。

Abstract

To investigate the influence of blade profile deviation on the performance of centrifugal impellers

the Krain impeller is selected as the research object. A blade deviation model based on actual manufacturing processes is developed to examine the effects of both local and global blade deviations on impeller performance. For local blade deviations

the impact of uniform-thickness profile deviations at different chordwise positions on impeller performance is analyzed. At the chordwise position with the most significant influence on performance

the relationship between different deviations and impeller performance is examined. For global blade deviations

the effects of both profile and twist deviations on impeller performance are explored. Numerical results indicate that local deviations near the leading edge have the greatest impact on impeller performance. A corresponding relationship exists between suction-side deviations and performance changes: deviations where the suction side is first undercut and then overcut degrade impeller performance

whereas deviations where the suction side is first overcut and then undercut optimize the curvature variation near the leading edge

increasing the flow passage area prone to blockage and thereby improving impeller performance. Specifically

under large-flow conditions

the isentropic efficiency increases by 1.5%

and the blockage flow rate rises by 0.6%. Global blade profile and twist deviations influence impeller performance by altering the entire flow passage area and the blade inlet/outlet installation angles

respectively. At the design condition

the total pressure ratio improves by up to 1.2% and 1.4% for global negative profile deviation and positive twist deviation

respectively. This study provides valuable insights for the manufacturing and blade profile optimization of centrifugal impellers.

关键词

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references

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