지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2012.5
- 수록면
- 452 - 458 (7page)
이용수
초록· 키워드
오류제보하기
The supersonic ejector-diffuser system makes use of high Mack number primary stream to entrain the secondary stream through pure shear action for the purposes of transport or compression of fluid. This system has many advantages over other fluid machinery because of no moving parts and no direct mechanical energy input. Recently, the supersonic ejector-diffuser system is being used as one of the most important components of the solar seawater desalination facility. However, the optimization of the ejector-diffuser system and its optimal operation condition are hardly known due to the complicated turbulent mixing, compressibility effects and even flow unsteadiness which are generated inside the ejector-diffuser system.
Nevertheless, much effort has devoted to the performance improvement of the system since it bears relatively very low efficiency. Several results have shown some conflict between the pressure recovery and the entrainment ratio. In the present study, mixing guide vanes were installed at the inlet of the secondary stream of the ejector-diffuser system for the purpose of the performance improvement. A CFD method has been applied to simulate the ejector-diffuser flow field. The present CFD results were validated with existing experimental data. The optimized mixing guide vane is discussed to increase the performance of the ejector. The operation characteristics of the ejector system with different numbers of the guide vanes are analyzed, in detail. The ejector-diffuser system performance is discussed in terms of the entrainment ratio, ejector efficiency, pressure recovery as well as total pressure loss.
Nevertheless, much effort has devoted to the performance improvement of the system since it bears relatively very low efficiency. Several results have shown some conflict between the pressure recovery and the entrainment ratio. In the present study, mixing guide vanes were installed at the inlet of the secondary stream of the ejector-diffuser system for the purpose of the performance improvement. A CFD method has been applied to simulate the ejector-diffuser flow field. The present CFD results were validated with existing experimental data. The optimized mixing guide vane is discussed to increase the performance of the ejector. The operation characteristics of the ejector system with different numbers of the guide vanes are analyzed, in detail. The ejector-diffuser system performance is discussed in terms of the entrainment ratio, ejector efficiency, pressure recovery as well as total pressure loss.
목차
1. INTRODUCTION
2. NUMERICAL ANALYSIS
3. RESULTS AND DISCUSSION
4. CONCLUSION
References
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UCI(KEPA) : I410-ECN-0101-2013-422-002848478