분사펌프에 연결된 구동관로 위치변화에 따른 유동특성

다국어 초록 (Multilingual Abstract)

A objective of this study is to identify the characteristics of mean velocity distribution through CFD analysis for various driven nozzle position changes. The analysis was done for different Reynolds number in entrance region of jet-pump and for several diameter ratios of driven nozzle.
(1) The largest absorption energy was found at the point s=1 in condition of diameter ratio 1:3.21 and point s=0.5 in condition of diameter ratio 1:2.25.
(2) The absorption energy was not related to the change of entrance velocity and the driven nozzle position having the largest absorption energy was function for cross section ratio.
(3) As the position of driven nozzle moves to the downstream, the absorption energy gets weaker. Because the energy from swirl was lost at the cross section gets smaller.
(4) As the position of driven nozzle moves to the downstream, the injection energy leans to the upper direction wall and as the Reynolds number increase, the lean phenomenon is more distinct.
(5) The flow quantity of driven nozzle, the diameter ratio 1:3.21, was 32% higher than that of 1 : 2.25 and as the inlet velocity gets faster the efficiency decreased. And as the cross section of the driven nozzle increases.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 수치해석 모델링
• 3. 결과 및 고찰
• 4. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

1 이준희, "가변형 음속/초음속 이젝터 시스템에 관한 실험적 연구" 대한기계학회 29 (29): 554-560, 2005

2 이 준 희, "가변형 음속/초음속 이젝터 시스템에 관한 실험적 연구" 대한기계학회 29 (29): 554-560, 2005

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5 Chen, F. C., "Performance of Ejector Heat Pumps" 11 : 289-300, 1987

6 Kim, Y. S., "Fluid Mechanics" Moon Woon Dang 223-, 1995

7 Yang, Y. G., "Finite Volume Meyhod Applied to Analyzing the Flow in the Duct of the Water-Jet Propulsor" Seoul Univ 1996

8 Nagahiro, J., "Experiments for Fine Air Bubble Production in Liquids Using Ejectors" 35 (35): 1581-1590, 1992

9 Lim, J. W., "Engine Room Cool System Using Jet Pump" 162-167, 2000

10 Quinn, B., "Ejector Performance at High Temperatures and Pressure" 13 (13): 948-954, 1976

11 Witte, J. H., "Efficiency and Design of Liquid-Gasejector" 10 (10): 602-607, 1995

12 Choi, B. G., "Computations of the Supersonic Ejector Flows With the Second Throat" 24 (24): 1128-1238, 2000

13 Fluegel, G., "Berechung von Strahl Apparaten, VDI for Schung Sheft,In: 395 March/April, Aus gabe B Band 10"

14 Viets, H., "Acoustic Interactions in Ejector" AIAA 1981

15 Kim, J. S., "A Study on the Shape Design Optimization of High-Speed Air Vehicles Using Navier-Stokes Equations" Korea Maritime Univ. 2001