Numerical study on effects of non-axisymmetric stator on fan flow field under boundary layer ingestion

被引：0

作者：

Fu W. ^{[1
]}

Wang W. ^{[1
]}

Sun P. ^{[1
]}

Wang C. ^{[2
]}

Zhao W. ^{[2
]}

机构：

[1] College of Safety Science and Engineering, Civil Aviation University of China, Tianjin

[2] Beijing Power Machinery Institute, Beijing

来源：

Tuijin Jishu/Journal of Propulsion Technology | 2024年 / 45卷 / 03期

关键词：

Boundary layer ingestion; Corner separation; Diffusion factor; Non-axisymmetric stator; Stall margin;

D O I：

10.13675/j.cnki.tjjs.2206060

中图分类号：

学科分类号：

摘要：

The boundary layer ingestion leads to serious total pressure and swirl distortion at the aerodynamic interface between the inlet and the fan，thus reducing the efficiency and stability of the fan，which is one of the main problems restricting its application. In order to improve the anti distortion ability of the fan，the fan stator is non- axisymmetrically designed and numerically simulated. The results show that compared with the original fan，the non-axisymmetric stator efficiency increased by 0.31%，the stall margin increased by 50.5%，the internal flow field of the fan is significantly improved，the diffusion factor is reduced，the corner separation range of the suction surface of the vane tip in the distortion zone is obviously cut down，and the flow capacity of the vane channel increases. The non-axisymmetric stator modification scheme changes the vane inlet metal angle and chord in the distortion zone，so that the incidence angle is basically unchanged，the solidity increases，and the airflow is not easily separated on the suction surface，thereby reducing the corner separation range，the dynamics loss is reduced，and the performance of the fan is improved. © 2024 Journal of Propulsion Technology. All rights reserved.

引用

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