### 基于能量耗散率的低速扩压叶栅损失研究

1. 1. 空军工程大学 航空航天工程学院, 西安 710038;
2. 西安交通大学 航空航天学院, 西安 710091;
3. 北京航空航天大学 能源与动力工程学院, 北京 100191
• 收稿日期:2014-11-05 修回日期:2015-05-14 出版日期:2015-10-15 发布日期:2015-06-30
• 通讯作者: 吴云, Tel.: 029-84787527 E-mail: wuyun1223@126.com E-mail:wuyun1223@126.com
• 作者简介:田思濛 男, 硕士研究生。主要研究方向: 轴流压气机内部流动及其等离子体流动控制。 E-mail: simoncale@163.com;吴云 男, 副教授, 博士生导师。主要研究方向: 等离子体流动控制。 Tel: 029-84787527 E-mail: wuyun1223@126.com
• 基金资助:

国家自然科学基金 (51207169, 51276797)

### Energy loss in a low-speed compressor cascade with dissipation function

TIAN Simeng1,2, WU Yun1,2, ZHANG Haideng3, LI Yinghong1, LI Jun1

1. 1. College of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi'an 710038, China;
2. College of Aeronautics and Astronautics, Xi'an Jiaotong University, Xi'an 710091, China;
3. College of Energy and Power Engineering, Beihang University, Beijing 100191, China
• Received:2014-11-05 Revised:2015-05-14 Online:2015-10-15 Published:2015-06-30
• Supported by:

National Natural Science Foundation of China (51207169, 51276797)

Abstract:

A viscous incompressible flow model in compressor cascade is set up without chemical reaction and heat input. Each of these components is resolved from the energy dissipation function with the derivation of the formula and simplified according to the simulation result in compressor cascade. These main factors are summarized as streamwise-vorticity item, axial resistance and shear force. Then, the axial characteristic of each component of the energy dissipation function is discussed in leading-edge loss, profile loss and passage loss with total pressure loss efficient. The streamwise-vorticity item, as the primary factor in passage loss to reflect the vortex structure in cascade, is concentrated near the passage vortex and separation surface. The axial resistance is concentrated on the boundary layer in the front of cascade passage, which is the key factor in leading-edge loss and profile loss to reflect the flow loss in diffusion and turning of boundary layer. The shear force item is concentrated on the separation surface and the boundary layer near the suction surface and endwall, which is the key factor in passage loss and profile loss to reflect the inhomogeneity of velocity. The relation between vortex structure and the energy dissipation is investigated with the distribution characteristic. One large dissipation zone is also found between main flow and corner separation region, which is influenced by υ(∂Vx/∂y)2 and the streamwise-vorticity item. Another is developed because of boundary layer near blades, which is influenced by flow resistance at the front part and υ(∂Vx/∂y)2 in the rear part. Governing factors on each axial plane are found while the key factor to energy dissipation is the shear item. The passage loss is significantly increased with high angle of attack, while the induction of streamwise-vorticity item is earlier in positive incidence and the shear force in boundary layer is higher in negative incidence.