Windage Loss Model Verification and Flow Characteristic Analysis in Shaft-Type Gap

DENG Qinghua; HU Lehao; ZHAO Yimeng; YANG Guoying; LI Jun; FENG Zhenping

doi:10.7652/xjtuxb202205006

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Windage Loss Model Verification and Flow Characteristic Analysis in Shaft-Type Gap

更新时间：2025-07-09

- Windage Loss Model Verification and Flow Characteristic Analysis in Shaft-Type Gap
- Vol. 56, Issue 5, Pages: 54-63(2022)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 中国电建河北省电力勘测设计研究院有限公司,石家庄,050031
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202205006
  CLC： TK14
- Online First：10 May 2022，
  
  Published：2022
- 稿件说明：
移动端阅览
DENG Qinghua, HU Lehao, ZHAO Yimeng, et al. Windage Loss Model Verification and Flow Characteristic Analysis in Shaft-Type Gap[J]. 2022, 56(5): 54-63.
DOI：

DENG Qinghua, HU Lehao, ZHAO Yimeng, et al. Windage Loss Model Verification and Flow Characteristic Analysis in Shaft-Type Gap[J]. 2022, 56(5): 54-63. DOI： 10.7652/xjtuxb202205006.

摘要

为准确预测旋转机械轴类间隙内的摩擦损失

对4种常见摩擦损失模型进行系统地验证

并对间隙内的流动特性进行详细分析。首先基于公开发表的间隙内摩擦损失和速度分布实验数据校验了数值方法

其次考核了在不同线速度和流体密度条件下4种摩擦损失模型的预测精度

分析了间隙内的流动特性。研究结果表明:采用雷诺应力湍流模型计算的摩擦损失和速度分布与实验结果偏差较小

验证了数值方法的可靠性; 当线速度为74～233 m/s时

模型2、模型4的预测结果与数值计算结果的相对偏差均小于10%

模型1、模型3的预测结果与数值结果偏差较大; 当压力为0.1～2.1 MPa时

间隙内的摩擦损失随着压力升高呈线性增加; 当雷诺数为10

～6×10

时

模型2的预测结果与数值计算结果接近

最大相对偏差为1.44%; 当雷诺数大于6×10

模型4与数值计算的结果接近

最大相对偏差为6.15%; 流场结果显示

间隙内会存在周期性泰勒涡

速度沿径向被分为3个区域

壁面处的涡量大于中心处涡量。研究结果可为摩擦损失模型的选择提供依据

为发展高精度损失模型提供参考。

Abstract

To predicate the windage loss in gap of rotating machinery

the four common windage loss models are verified systematically

and the flow characteristics in gap are analyzed in detail. Firstly

the numerical method is verified by the published experiment data of windage loss and velocity distribution in gap. Secondly

the prediction accuracy of these four models is validated under different linear velocity and fluid density conditions

and the flow characteristics are analyzed in detail. The results show that the windage loss and velocity distribution obtained from the Reynolds stress model deviate only slightly from e

xperimental results

verifying reliability of the numerical method. Within a linear velocity of 74-233 m/s

the relative deviation between the predicted results and numerical results is less than 10% for models 2 and 4 and is large for models 1 and 3. Under the pressure of 0.1-2.1 MPa

the windage loss increases linearly with the increase of the pressure. The predicted result of model 2 is closer to its numerical result

with a maximum relative deviation of 1.44%when the Reynolds number ranges from 10

to 6×10

and the predicted result of model 4 is closer to its numerical result

with a maximum relative deviation of 6.15% when it is higher than 6×10

. Flow field results show that there are periodic Taylor vortices in gap

the velocity pattern is divided into three regions in radial direction

and the vorticity near the wall is greater than that at the centerline. The study results provide the basis on selecting windage loss model and offer reference to the development of more accurate models.

关键词

Keywords

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