Experiment of an ultra-high-lift low pressure turbine performance at unsteady state

被引：0
|
作者：
Sun, Shuang [1 ,2 ]
Lei, Zhi-Jun [2 ]
Lu, Xin-Gen [2 ]
Li, Wei [2 ]
Zhu, Jun-Qiang [2 ]
机构：
[1] Department of Aviation Engineering, Civil Aviation University of China, Tianjin
[2] Gas Turbine Laboratory, Institute of Engineering Thermophyiscs, Chinese Academy of Sciences, Beijing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2015年 / 30卷 / 05期
关键词：
Boundary layer; Low pressure turbine; Separation; Transition; Wakes;
D O I：
10.13224/j.cnki.jasp.2015.05.022
中图分类号：
学科分类号：
摘要：
The performance of an ultra-high-lift after loaded low pressure turbine (LPT) at steady and unsteady state has been investigated experimentally in the present paper. The experiment result show that both of the separation bubble and profile loss have been decreased by the wakes induced transition combined with the separation transition at low inlet Reynolds number and low inlet free stream turbulence intensity under the effect of upstream wakes. In one wake passing periodicity, the boundary layer separation is expanded and shrunken periodically due to the upstream wakes. It has also been seen that the wake is cut into 2 parts-a primary wake and a secondary wake, downstream the blade maximum camber. Even though the secondary wake can induce the transition, the suppression effect of separation is low due to the low wake intensity. ©, 2015, BUAA Press. All right reserved.
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页码：1192 / 1199
页数：7
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