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류명석(M.S.Lyu),이은준(E.J.Lee) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1994 No.11_1
This paper discusses the cooling air flow inside the engine room. The fluid flow in the engine compartment was investigated by numerical analysis. As the complex geometry of the engine compartment, mesh generation is not easy. Therfore we used code "ICEM" to generate mesh from Cartesian mesh model. The Reynolds-averaged Navier Stokes equations, together with the porous flow model for the radiator and condenser, were solved. Computation was perfomed for high speed , in which steady, incompressible and viscous flow have been simulated using the standard K-ε turbulence model. This solver is used the commercial code "STAR-CD". We hope to obtain the heat and fluid flow data in order to improve the cooling performace inside engine room as the shape of the front opening area.<br/>
차 개구형상이 엔지룸내 유동에 미치는 영향에 관한 수치연구
류명석(M.S.Lyu),이은준(E.J.Lee),구영곤(Y.G.Ku) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
The knowledge of air flow in an engine room has become more and more important in recent car design. The fluid flow in the engine compartment was investigated by numerical analysis. Due to the complex geometry of the engine compartment, mesh generation is a time-consuming job. In this research, the "ICEM" code was used to generate meshes by the Cartesian mesh model. The Reynolds-averaged Navier Stokes equations, together with the porous flow model for radiator and condenser, were solved. Computation was perfomed for the steady, incompressible, and high speed viscous flow, adopting the standard K-E turbulence model. The "STAR-CD" code was used as a solver. The effect of car front openning area on the flow in engine room was also investigated.<br/>
실차 엔진룸내 3차원 평균 유동 측정에 관한 연구(Ⅰ)
류명석(M.S.Lyu),김도연(D.Y.Kim),맹주성(J.S.Maeng),손동연(D.Y.Shon),J.K.Oh(J.K.Oh) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
The recent trend of higher output engines with more auxiliary parts is resulting in greater heat generation in the engine compartment. In order to maximize the heat dissipation and eliminate the inefficient flow in the engine compartment, it is necessary to understand the flow field under the hood. In this respect, experimental study as well as numerical analysis should be conducted. The automated measuring system was constructed to obtain 3-D mean flow data with high accuracy. The measurements have been made on a vehicle with a steady incoming air flow. The result shows that there exists a high degree of non-unformity in the mean flow velocity at the front of radiator.<br/>
류명석(M.S.Lyu),구영곤(Y.G.Ku),김경훈(K.H.Kim),김경희(K.H.Kim),길재성(J.S.Ghil) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
The importance of intake system can not be overstressed in the recent heavy duty commercial vehicle design. The basic requirements of intake system are to have less flow resistance and better air cleaning performance which have direct effects on the performance and service life of engine. In order to improve the performance of engine intake system, the flow phenomena in the intake system should be fullly understood. With readilly availble CFD code. the numerical analysis becomes the more reliable tools for flow optimization in recent design work.<br/> In this research. flow field in the intake system was analyzed by Star-CD, the 3-D computaional fluid dynamic code. Especially, the flow inside of air cleaner was thoroughly analyzed. Pressure distribution and velocity profile in the air cleaner and intake duct was obtained. Having the dust seperated from incoming air at the expence of less pressure- drop is the ultimate goal for the research.<br/>