热科学学报（英文版）2001，Vol.10Issue(4)：325-330,6.
Mixing Augmentation of Supersonic Streams
Mixing Augmentation of Supersonic Streams
S. Hari 1J. Kurian2
作者信息
- 1. Department of Aerospace Engineering, Indian Institute of Technology, Madras, India
- 2. Department of Aerospace Engineering, Indian Institute of Technology, Madras, India
- 折叠
摘要
Abstract
The use of passive mixing devices to enhance the mixing of supersonic streams is of importance in many aerospace and allied applications. A comparative experimental study of two such non-conventional axi symmetric supersonic nozzles for mixing augmentation is undertaken in the present study. The nozzles studied are conventional convergent divergent (c-d), ramp, and nozzle with secondary tabs at the Mach number of 1.7.The freejet characteristics of the jets from the nozzles and the confined mixing of the jets under isothermal and non-isothermal conditions were experimentally investigated. In addition, schlieren and laser light sheet methods are employed for flow visualization. Results of experiments on freejet showed rapid total pressure decay, higher jet width, and increased shear layer width in the case of jets from non-conventional nozzles. Also visualized were complex shock patterns in these jets. The confined mixing studies in both cold and hot flows confirm the increased mixing behavior of non-conventional nozzles within shorter mixing duct lengths. Laser sheet visualization clearly demonstrated the formation of streamwise vortices, which accounts for the enhanced mixing while employing the nozzles under study.关键词
non-conventional nozzles/supersonic mixing/laser light sheet studies/isothermal mixingKey words
non-conventional nozzles/supersonic mixing/laser light sheet studies/isothermal mixing分类
能源科技引用本文复制引用
S. Hari,J. Kurian..Mixing Augmentation of Supersonic Streams [J].热科学学报（英文版）,2001,10(4):325-330,6.
