Effects of Wakes on Penetration and Transition of Boundary Layer of Low-Pressure Turbine under Positive Incidence Condition

被引：0

作者：

Sun S. ^{[1
,2
]}

Tan T.-R. ^{[1
]}

Wu X.-S. ^{[1
]}

Meng L. ^{[1
]}

Du H.-L. ^{[1
]}

Shen A.-W. ^{[1
]}

机构：

[1] Department of Aviation Engineering, Civil Aviation University of China, Tianjin

[2] Tianjin Key Laboratory of Airworthiness and Maintenance of Civil Aircraft, Tianjin

来源：

Tuijin Jishu/Journal of Propulsion Technology | 2021年 / 42卷 / 11期

关键词：

Boundary layers; Penetration; Transition; Turbine; Turbulence kinetic energy; Wake induction;

D O I：

10.13675/j.cnki.tjjs.200043

中图分类号：

学科分类号：

摘要：

In order to study the penetration of the upstream wakes into the boundary layer and the effect on transition of the boundary layer under positive incidence, the boundary layer on the suction surface of a highly-loaded low pressure turbine was investigated at design and +10° incidence conditions under numerical simulation and experiment. The simulations are performed with the CFX, by use of large eddy simulation (LES). It is found that the wakes play a greater role in promoting the transition of the boundary layer at +10° incidence than that at 0° incidence. The turbulence of the wake under +10° incidence penetrate much deeper into the boundary layer due to the larger intersection angle between the direction of wake center and the tangent of the suction surface. Moreover, the intensity of the wake-amplified Klebanoff streaks is stronger, and the wake-induced transition onset is more upstream under +10° incidence. © 2021, Editorial Department of Journal of Propulsion Technology. All right reserved.

引用

页码：2474 / 2484

页数：10

共 25 条

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