한국추진공학회:학술대회논문집 (Proceedings of the Korean Society of Propulsion Engineers Conference)
- 한국추진공학회 2010년도 제35회 추계학술대회논문집
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- Pages.105-110
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- 2010
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- 1975-342X(pISSN)
충격파 발생기를 적용한 짧은 초음속 이젝터에 관한 연구
A Study of short supersonic ejector with shock generators
- ;
- 김희동
- Lijo, Vincent (School of Mechanical Engineering, Andong National University) ;
- Kim, Heuy-Dong (School of Mechanical Engineering, Andong National University)
- 발행 : 2010.11.25
초록
Supersonic ejectors are simple mechanical components, which generally perform mixing and recompression of two fluid streams. Ejectors have found many applications in engineering. In aerospace engineering, they are used for high altitude testing (HAT) of a propulsion system by reducing the pressure of a test chamber. It is composed of three major sections: a vacuum test chamber, a propulsive nozzle, and a supersonic exhaust diffuser (SED). This paper aims at the improvement in HAT facility by focusing attention on the vertical firing rocket test stand with shock generators. Shock generators are mounted inside the SED for improving the pressure recovery. The results clearly showed that the performance of the ejector-diffuser system was improved with the addition of shock generators. The improvement comes in the form of reduction of the starting pressure ratio and the vertical height of test stand. It is also shown that shock generators are useful in reducing the total pressure loss in the SED.