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양희천(H.C.Yang),유정열(J.Y.Yoo),이준식(J.S.Lee),최해천(H.Choi) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
In this paper three-dimensional external airflow around road vehicle models was numerically studied to investigate the aerodynamic characteristics. FVM based on a general curvilinear coordinate system was used to solve the governing equations. The drag coefficients by the calculation were about 40-50% higher than the experimental values.<br/>
박상봉(S.B.Park),이은현(E.H.Lee),유정열(J.Y.Yoo),이준식(J.S.Lee),최해천(H.Choi) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
To understand in-cylinder flow characteristics in a lean bum engine. flow experiments under steady conditions without a piston are carried out. Three-dimensional velocity fields at various valve lifts are measured using an LDV. Non-dimensional swirls for the standard and helical ports are obtained from the measured velocities and compared.<br/>