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논문 기본 정보

자료유형
학술대회자료
저자정보
Fanshi Kong (Andong National University) Heuy Dong Kim (Andong National University) Yingzi Jin (Zhejiang Sci-Tech University)
저널정보
한국추진공학회 한국추진공학회 학술대회논문집 한국추진공학회 2012년도 제39회 추계학술대회 논문집
발행연도
2012.11
수록면
247 - 254 (8page)

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Generally speaking, the flow field in the ejector-diffuser system is very difficult to be predicted due to the complicated turbulent mixing, compressibility effects and even flow unsteadiness. Many works have been done in the past years to achieve a higher efficiency and improve the performance of the ejector system, but not yet satisfactory, compared with that of other fluid machinery. Considering the complexity and difficulty on the researching, how to enhance the performance of ejector-diffuser system effectively became a significant task. In the present study, the supersonic nozzle was redesigned using Chevrons installed at the inlet of the secondary stream of the ejector-diffuser system for the purpose of the performance improvement. A CFD method based on Fluent has been applied to simulate the supersonic flows and shock waves inside the ejector. Primary numerical analysis results show that the Chevrons get a positive effect on the ejector flows. The comparison of ejector performance with and without the Chevron was obtained and optimal number of mixing guide vane is discussed to increase the performance. The ejector-diffuser system performance is discussed in terms of the entrainment ratio, pressure recovery as well as total pressure loss.

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ABSTRACT
1. INTRODUCTION
2. NUMERICAL SIMULATION
3. RESULTS AND DISCUSSION
4. CONCLUSIONS
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UCI(KEPA) : I410-ECN-0101-2014-572-000717957