한국추진공학회:학술대회논문집 (Proceedings of the Korean Society of Propulsion Engineers Conference)
- 한국추진공학회 2012년도 제38회 춘계학술대회논문집
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- Pages.309-317
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- 2012
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- 1975-342X(pISSN)
Numerical Simulation of the Effect of Finite Diaphragm Rupture Process on Micro Shock Tube Flows
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- 김희동 (안동대)
- Arun Kumar, R. (School of Mechanical Engineering, Andong National University) ;
- Kim, Heuy-Dong (School of Mechanical Engineering, Andong National University)
- 발행 : 2012.05.17
초록
Recent years have witnessed the use of micro shock tube in various engineering applications like micro combustion, micro propulsion, particle delivery systems etc. The flow characteristics occurring in the micro shock tube shows a considerable deviation from that of well established conventional macro shock tube due to very low Reynolds number and high Knudsen number effects. Also the diaphragm rupture process, which is considered to be instantaneous process in many of the conventional shock tubes, will be crucial for micro shock tubes in determining the near diaphragm flow field and shock formation. In the present study, an axi-symmetric CFD method has been applied to simulate the micro shock tube, with Maxwell's slip velocity and temperature jump boundary conditions. The effects of finite diaphragm rupture process on the flow field and the shock formation was investigated, in detail. The results show that the shock strength attenuates rapidly as it propagates through micro shock tubes.