Windage Loss and Flow Characteristics in Shaft-Type Rotor-Stator Gaps of Rotating Machinery

LIU Bin; ZHAO Zhuobin; DENG Qinghua; LI Jun

doi:10.7652/xjtuxb202609016

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Windage Loss and Flow Characteristics in Shaft-Type Rotor-Stator Gaps of Rotating Machinery

更新时间：2026-09-04

- Windage Loss and Flow Characteristics in Shaft-Type Rotor-Stator Gaps of Rotating Machinery
- Journal of Xi'an Jiaotong University Vol. 60, Issue 9, Pages: 165-176(2026)
- 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/xjtuxb202609016
  CLC： TK14
- Received：06 January 2026，
  
  Online First：14 April 2026，
  
  Published：10 September 2026
- 稿件说明：
移动端阅览
LIU Bin, ZHAO Zhuobin, DENG Qinghua, et al. Windage Loss and Flow Characteristics in Shaft-Type Rotor-Stator Gaps of Rotating Machinery[J]. Journal of Xi'an Jiaotong University,2026,60 (9):165-176. https://doi.org/10.7652/xjtuxb202609016.
DOI：

LIU Bin, ZHAO Zhuobin, DENG Qinghua, et al. Windage Loss and Flow Characteristics in Shaft-Type Rotor-Stator Gaps of Rotating Machinery[J]. Journal of Xi'an Jiaotong University,2026,60 (9):165-176. https://doi.org/10.7652/xjtuxb202609016. DOI：

摘要

为厘清宽间隙半径条件下轴类转静间隙内风阻损失和流动特性的影响机制，基于数值方法，系统分析了间隙半径比、转子半径、转子转速等关键参数对风阻损失系数的影响规律，揭示了间隙半径比在1.3范围内的流动机理，提出了最佳间隙半径比的预测方法，构建了宽间隙半径比范围的风阻损失系数模型。结果表明：间隙半径比对风阻损失系数的影响机制主要包括壁面剪切作用以及流体内部的耗散效应。当间隙半径比较小时，流体受到的剪切作用占主导；当间隙半径比较大时，流体内部的耗散效应为主要因素。随间隙半径比增加，风阻损失系数先减小后增大，存在使得风阻损失系数最小的最佳间隙半径比。随着转子半径增大，最佳间隙半径比逐渐减小，当转子半径由20 mm增大至60 mm时，最佳间隙半径比由0.425降低至0.167。基于数值模拟结果，分别提出了轴类转静间隙的最佳间隙半径比预测方法及宽间隙半径比范围的风阻损失系数模型，其最大预测偏差分别为5.58%和11.81%。研究结果为宽间隙半径比条件下轴类转静间隙内的风阻损失研究以及间隙结构优化提供了技术支撑。

Abstract

To clarify the mechanisms affecting windage loss and flow characteristics in shaft-type rotor-stator gaps over a wide range of gap-radius ratios

the effects of key parameters

including the gap-radius ratio

rotor radius

and rotor rotational speed

on the windage loss coefficient are systematically analyzed using numerical methods.The flow mechanism within a gap-radius ratio of 1.3 is revealed

a method for predicting the optimal gap-radius ratio is proposed

and a windage loss coefficient model covering a wide range of gap-radius ratios is developed.The results show that the effects of the gap-radius ratio on the windage loss coefficient mainly include wall shear and fluid dissipation.At small gap-radius ratios

the shear effect is dominant

whereas at large gap-radius ratios

fluid dissipation becomes the primary factor.As the gap-radius ratio increases

the windage loss coefficient first decreases and then increases

and an optimal gapradius ratio that minimizes the windage loss coefficient exists.As the rotor radius increases

the optimal gap-radius ratio gradually decreases.When the rotor radius increases from 20 mm to 60 mm

the optimal gap-radius ratio decreases from 0.425 to 0.167.Based on the numerical simulation results

a method for predicting the optimal gap-radius ratio of shaft-type rotor-stator gaps and a windage loss coefficient model covering a wide range of gap-radius ratios are proposed

with maximum prediction deviations of 5.58% and 11.81%

respectively.The results provide technical support for windage loss studies and gap structure optimization in shaft-type rotor-stator gaps over a wide range of gap-radius ratios.

关键词

Keywords

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