Volume fraction technique for measuring the minimum value of mass flow in turbine rotor-stator disk cavities

SUN Ji-ning; LUO Xiang; LIU Jin-nan; XU Guo-qiang; ZHOU Zhi-xiang; QIU Chang-bo

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Volume fraction technique for measuring the minimum value of mass flow in turbine rotor-stator disk cavities

更新时间：2026-07-07

- Volume fraction technique for measuring the minimum value of mass flow in turbine rotor-stator disk cavities
- Vol. 27, Issue 5, (2012)
- 作者机构：
  
  1. 北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京,100191
  2. 中国航空工业集团公司中国航空动力机械研究所,湖南,株洲,412002
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2012
- 稿件说明：
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SUN Ji-ning, LUO Xiang, LIU Jin-nan, et al. Volume fraction technique for measuring the minimum value of mass flow in turbine rotor-stator disk cavities[J]. 2012, 27(5).
DOI：

SUN Ji-ning, LUO Xiang, LIU Jin-nan, et al. Volume fraction technique for measuring the minimum value of mass flow in turbine rotor-stator disk cavities[J]. 2012, 27(5). DOI：

摘要

为防止涡轮盘腔转静系统高温“燃气入侵”现象发生

需要确定最小封严流量.在不同的转速和不同出气间隙下

采用体积分数法分别对6种典型封严结构进行实验研究

以确定它们在不同工况下的最小封严流量并得出其变化规律:在固定的出气间隙值下

最小封严冷气流量随转盘转速的增加而增大

且几乎呈线性变化;对于固定的转速

随着出气间隙的增加

最小封严冷气流量也随之增加.拟合出不同封严结构的级间封严准则函数关系式

并探寻出封严效果最优的封严结构.

Abstract

The minimum value of the cooling air flow is a critical flow rate for preventing hot gas ingestion happened in the rotor-stator disk cavity system of turbines.Experimental investigation based on volume fraction technique was performed to found the minimum values of cooling air flow of six typical rim seal structures with different rotating velocities and seal clearances.The results showed that

the minimum value of the seal air flow rate almost increases linearly with rotational velocity

and also increases with the seal clearance.Furthermore

the corresponding correlations about sealing flow rate were fitted for different structures

and an optimum option of rim seal structure was advised.

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Related Institution

先进航空发动机协同创新中心

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北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室

中国航空发动机集团沈阳发动机研究所

School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics

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