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논문 기본 정보

자료유형
학술대회자료
저자정보
JianGuo Sun (Andong National Univ) Heuy Dong Kim (Andong National Univ) YingZi Jin (ZheJiang Sci-Tech Univ)
저널정보
한국추진공학회 한국추진공학회 학술대회논문집 한국추진공학회 2012년도 제39회 추계학술대회 논문집
발행연도
2012.11
수록면
238 - 246 (9page)

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In many engineering applications such as rocket propulsions and pneumatic devices, the gas flows containing very fine solid particles are employed frequently. The presence of particles in high-speed flows results in a very complicated and interesting phenomena due to particle-turbulence interactions. It is difficult as well as costly to investigate such suspension flows. CFD approach may be a good means to get insight into the gas-solid suspension flows. The present study investigates the effect of particle diameter on the gas solid suspension flow through a supersonic nozzle. The numerical model based on the Discrete Phase Model (DPM) has been employed to simulate the particle movement. The results show that the different sizes of particle have different influence on the gas phase behavior. The structure of shock train, the separation point, and the vortex of the backflow are all changed as the particle diameter varied from small size to large size. As the particle diameter increases the flow characteristics behave differently. The separation point first moves toward the downstream, but after the critical value of the diameter, it moves back to upstream. The change of gas flow behavior in turn affects the particle distribution. When the particle diameter is too small or too big, the particle concentration at the shear layer will be weak.

목차

ABSTRACT
1. INTRODUCTION
2. NUMERICAL MODEL
3. RESULTS AND DISCUSSION
4. CONCLUSIONS
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