Experimental and numerical investigation of jet mixing

Supersonic mixing or in other words the mixing of two streams flowing at different speeds has been studied a lot in the past pertaining especially to the effect of high speed stream flow mixing with a slow stream. The various techniques developed have always had the drawback of high pressure losses sustained along-with other losses to obtain optimum mixing between the two streams. It is a continuing source of study to understand the underlying physics inherent in this phenomena. Confined Supersonic Mixing is beset with complex phenomena that usually consist of the following - shear-layer formation, shear/boundary-layer interaction, shock/shear-layer interaction etc. which makes the study of such phenomena a complex task. The aim of this work is to further the understanding of the effects pertaining to confined mixing of different speeds i.e. one high speed and one slow speed or in other words a supersonic and a subsonic speed stream. Further enhancing this mixing process is the ultimate aim of the present work. This is done with the help of techniques to force stream mixing in the shortest distance possible with minimum pressure loss. Every active technique would be actually giving rise to a pressure loss because of the intrusive nature of the technique involved. A compromise between the enhancement of mixing obtained to the maximum acceptable pressure loss is the aim of this work. This is carried out using the wedge and the wedge/cavity combination which is in itself an active/passive source of introducing further complexity to the problem to be studied. The study is carried out both experimentally and numerically with the help of various techniques and a comparison of the two methods gives us an insight into the interaction that is characteristic of this process. The enhancement of the mixing process between the two streams with acceptable supersonic pressure recovery is the main result of this work. This would further our understanding of the complex processes taking place in this phenomena.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2004

Author dc:creator

• Thaker, Iqbal Husain

Contributors dc:contributor

• Olivier, Herbert

• info:eu-repo/classification/ddc/620
• Überschallströmung
• Unterschallströmung
• Mischen
• Strahlpumpe
• Ingenieurwissenschaften
• Passive Supersonic mixing
• shock-shear layer interaction
• shock-boundary layer interaction
• shock-shock interaction
• pressure recovery

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

eng

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123506%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:61892