Multi-parameter influence on film cooling of blade tip

被引：0

作者：

Han, Chang ^{[1
]}

Ren, Jing ^{[1
]}

Jiang, Hong-De ^{[1
]}

机构：

[1] Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

来源：

Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | 2012年 / 33卷 / 09期

关键词：

Luminous paint - Supersonic aerodynamics - Turbomachine blades - Gas turbines - Mass transfer;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The tip film cooling characteristic of one-stage blade of some F-class gas turbine is investigated using pressure sensitive paint (PSP) in different conditions of mass flow ratio (MFR), density ratio (DR) and tip clearance in this work. Cooling gas cover suction area on flat tip, but cover pressure area on squealer tip and format accumulated-effect to trailing edge because of the eddy produced in the squealer. The film cooling effectiveness of both flat tip and squealer tip increases as mass flow ratio increases. High density ratio decreases the exit momentum and constrains the lift-off of cooling ejection, so as to improve the film cooling effectiveness of blade tip. Tip clearance has relative influence with tip geometry and mass flow ratio, and film cooling effectiveness responses differently in different condition as tip clearance increases. Moreover, the integrate film cooling effect of squealer tip is better than that of flat tip.

引用

页码：1501 / 1504