한국분무공학회지 (Journal of ILASS-Korea)
- 제9권4호
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- Pages.38-45
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- 2004
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- 1226-2277(pISSN)
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- 2288-9051(eISSN)
Eulerian-Lagrangian 다상 유동해석법에 의한 피에조 인젝터의 노즐 내부 비정상 캐비테이션 유동해석
Analysis of Unsteady Cavitating Flows in Fuel Injection Nozzle of Piezo-driven Injector by Eulerian-Lagrangian Multi-phase Method
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Lee, Jin-Wook
;
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Min, Kyung-Duk
;
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Kang, Kern-Yong
;
- Gavaises, M. (City University, London) ;
- Arcoumanis, C. (City University, London)
- 발행 : 2004.12.31
초록
This study describes the analysis results of unsteady cavitating flows behavior inside nozzle of the prototype piezo-driven injector. This piezo-driven injector has been recognised as one of the next generation diesel injector due to a higher driven efficiency than the conventional solenoid-driven injector. The three dimensional geometry model along the central cross-section regarding of one injection hole has been used to simulate the cavitating flows for injection time by at fully transient simulation with cavitation model. The cavitation model incorporates many of the fundamental physical processes assumed to take place in cavitating flows. The simulations performed were both fully transient and 'pseudo' steady state, even if under steady state boundary conditions. We could analyze the effect the pressure drop to the sudden acceleration of fuel, which is due to the fastest response of needle, on the degree of cavitation existed in piezo-driven injector nozzle
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