低雷诺数下涡轮叶顶凹槽泄漏流动特性的数值研究

彭昊; 沈斌; 戴韧; 陈榴

doi:10.19805/j.cnki.jcspe.2025.240480

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低雷诺数下涡轮叶顶凹槽泄漏流动特性的数值研究

动力设备与系统 | 更新时间：2026-10-10

- 低雷诺数下涡轮叶顶凹槽泄漏流动特性的数值研究
- Numerical Study on Leakage Flow Characteristics of Turbine Blade Squealer Tip at Low Reynolds Numbers
- 动力工程学报 2025年45卷第9期页码：1379-1386
- 作者机构：
  
  上海理工大学能源与动力工程学院,上海,200093
- 作者简介：
  
  彭昊(2000—),男,湖北黄冈人,硕士研究生,研究方向为旋转机械内部的气动问题
  陈榴(通信作者),女,副教授,硕导,博士,E-mail:chen_liu@usst.edu.cn
- 基金信息：
  
  国家自然科学基金资助项目(52276034)
- DOI：10.19805/j.cnki.jcspe.2025.240480
  中图分类号：
- 网络首发：2025-09-16，
  
  纸质出版：2025
- 稿件说明：
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彭昊,沈斌,戴韧,陈榴. 低雷诺数下涡轮叶顶凹槽泄漏流动特性的数值研究动力工程学报, 2025, 45(9): 1379-1386 https://doi.

org/10.19805/j.cnki.jcspe.2025.240480
彭昊,沈斌,戴韧,陈榴. 低雷诺数下涡轮叶顶凹槽泄漏流动特性的数值研究动力工程学报, 2025, 45(9): 1379-1386 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240480.

org/10.19805/j.cnki.jcspe.2025.240480 DOI：

摘要

减少叶顶泄漏损失对于提高低雷诺数涡轮气动性能至关重要。通过数值模拟方法

对比了平顶叶尖结构

分析了雷诺数

在3.5×10

~35×10

范围内凹槽叶尖间隙内的流动特性。结果表明:当叶栅与机匣存在相对运动时

叶顶泄漏损失在总损失中的占比与雷诺数有关

泄漏损失随着雷诺数的增大而增大;在常规低雷诺数范围内

还存在一个第二临界雷诺数

=6×10

当

时

叶顶凹槽不仅无法减少泄漏质量流量

反而会加剧泄漏流与主流的掺混

增大叶顶流场处的流动损失;当

时

凹槽结构能够有效抑制泄漏质量流量

提升涡轮级效率

在本文计算工况中

效率最大提升幅度可达0.28百分点。

Abstract

Reducing tip leakage losses is crucial for improving the aerodynamic performance of low Reynolds number turbines. By using numerical simulation methods

flat blade tip structure was compared with squealer blade tip

and their flow characteristics within tip clearance were analyzed for Reynolds number (

) range of 3.5×10

-35×10

. Results show that when there is a relative motion between blade row and casing

the proportion of blade tip leakage losses to total losses is related to the Reynolds number

with leakage losses increasing as the Reynolds number increases. Within the conventional low Reynolds number range

there exists a second cri

tical Reynolds number

=6×10

. When

the squealer tip not only fails to reduce leakage flow rate but actually intensifies the mixing of the leakage flow with the main flow

increasing the flow losses at the blade tip. When

the squealer structure can effectively suppress leakage flow rate and improve the turbine stage efficiency. In the calculation conditions of this paper

the maximum efficiency improvement can reach 0.28%.

关键词

Keywords

references

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