| Computational Analysis of a Variable Ejector Flow |
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| 作者姓名： | H.D. KIM J.H. LEE T. SETOGUCHI S.MATSUO |
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| 作者单位： | School of Mechanical Engineering Andong National University 388 Songchun-dong Andong 760-749 Korea，School of Mechanical Engineering Andong National University 388 Songchun-dong Andong 760-749 Korea，Department of Mechanical Engineering Saga University 1 Honjo Saga 840-8502 Japan，Department of Mechanical Engineering Saga University 1 Honjo Saga 840-8502 Japan |
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| 摘 要： | The present study addresses a variable ejector which can improve the ejector efficiency and control the re-circulation ratio under a fixed operating pressure ratio. The variable ejector is a facility to obtain specific recirculation ratio under a given operating pressure ratio by varying the ejector throat area ratio. The numerical simulations are carried out to provide an understanding of the flow characteristics inside the variable ejector. The sonic and supersonic nozzles are adopted as primary driving nozzles in the ejector system, and a movable cone cylinder, inserted into a conventional ejector-diffuser system, is used to change the ejector throat area ratio. The numerical simulations are based on a fully implicit finite volume scheme of the compressible, Reynolds-Averaged Navier-Stokes equations. The results show that the variable ejector can control the recirculation ratio at a fixed operating pressure ratio.
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| 关 键 词： | 变量排出器 再环流比 排出口面积比 排出效率 |
| 收稿时间： | 31 March 2005 |
Computational analysis of a variable ejector flow |
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| H.D. KIM,J.H. LEE,T. SETOGUCHI,S.MATSUO.Computational Analysis of a Variable Ejector Flow[J].Journal of Thermal Science,2006,15(2):140-144. |
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| Authors: | H D Kim J H Lee T Setoguchi S Matsuo |
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| Affiliation: | (1) School of Mechanical Engineering, Andong National University, 388, Songchun-dong, Andong, 760-749, Korea;(2) Department of Mechanical Engineering, Saga University, 1, Honjo, Saga 840-8502, Japan |
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| Abstract: | The present study addresses a variable ejector which can improve the ejector efficiency and control the re-circulation ratio under a fixed operating pressure ratio. The variable ejector is a facility to obtain specific recirculation ratio under a given operating pressure ratio by varying the ejector throat area ratio. The numerical simulations are carried out to provide an understanding of the flow characteristics inside the variable ejector. The sonic and supersonic nozzles are adopted as primary driving nozzles in the ejector system, and a movable cone cylinder, inserted into a conventional ejector-diffuser system, is used to change the ejector throat area ratio. The numerical simulations are based on a fully implicit finite volume scheme of the compressible, Reynolds-Averaged Navier-Stokes equations. The results show that the variable ejector can control the recirculation ratio at a fixed operating pressure ratio. |
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| Keywords: | variable ejector ejector throat area ratio re-circulation ratio |
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