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An experimental study on the characteristics of transverse jet into a supersonic flow field  

박종호 (충남대학교 기계공학과)
김경련 (충남대학교 기계공학과 대학원)
신필권 (충남대학교 기계공학과 대학원)
박순종 (충남대학교 기계공학과 대학원)
길경섭 (한국항공우주연구원)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.6, no.4, 2003 , pp. 124-131 More about this Journal
Abstract
When a secondary gaseous flow is injected vertically into a supersonic flow through circular nozzle, a complicated structure of flow field is produced around the injection area. The interaction between the two streams produces a strong bow shock wane on the upstream side of the side-jet. The results show that bow shock wave and turbulent boundary layer interaction induces the boundary layer separation in front of the side-jet. This study is to analyze the structure of flow fields and distribution of surface pressure on the flat plate according to total pressure ratio using a supersonic cold-flow system and also to study the control force of affected side-jet. The nozzle of main flow was designed to have Mach 2.88 at the exit. The injector has a sonic nozzle with 4mm diameter at the exit of the side-jet. In experiments, The oil flow visualization using a silicone oil and ink was conducted in order to analyze the structure of flow fields around the side-jet. The flow fields are visualized using the schlieren method. In this study, a computational fluid dynamic solution is also compared with experimental results.
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