Experimental and Numerical Investigation of High Load Turbine Blade Tip Cavity Structures

被引：15

作者：

Chen, Yingjie ^{[1
]}

Jiang, Dengyu ^{[2
]}

Du, Zhengshuai ^{[1
]}

Wang, Songtao ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China

[2] ACEE Commercial Aircraft Engine Co Ltd, Shanghai 200241, Peoples R China

来源：

JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME | 2023年 / 145卷 / 06期

关键词：

cavity and leaking flows; computational fluid dynamics; impact on cavity leaking flows on performance; measurement techniques; SQUEALER TIP; OPTIMIZATION; PERFORMANCE; GAP;

D O I：

10.1115/1.4056512

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Leakage flow loss is an important factor affecting the aerodynamic efficiency of turbines. In this paper, experimental and numerical computational studies were used to investigate three different tips of a highly loaded turbine rotor. The single-cavity tip formed by squealers was considered as the original structure. Based on this, two improved structures were developed, namely, cavity winglet tip (CWT) and double-cavity combined winglet tip (DCWT). Five-hole probe and oil flow visualization were used for experimental studies, and numerical calculations were used to analyze vortex system structure and loss development. It was found that the double-cavity combined winglet tip structure can effectively change the vortex structure inside the cavity and reduce the leakage flowrate. At the same time, the aerodynamic performance was optimized by 4%.

引用

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