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비등방성 난류모델이 충돌분무특성에 미치는 영향에 대한 수치해석 연구
고권현(GwonHyunKo),유홍선(HongSunRyou),이성혁(SeongHyukLee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is an aim of this study to perform extensive numerical study for analyzing the anisotropic turbulence effect on impinging spray characteristics. The turbulence model of Durbin is used for comparisons with the k-ε model. The turbulence-induced dispersions of droplets are considered to describe the anisotropy of turbulence effectively and<br/> spray/wall interactions are simulated using the model of Lee and Ryou. Present study investigates the behaviors of<br/> the gas-phase flow and the internal structures of impinging diesel sprays which include velocity profiles, local gas velocity and local droplet velocity and compared the results with experimental data by two adopted turbulence models. When the anisotropy effect of turbulence is included, better predictions for both gas and droplet velocities are obtained, compared to the k-ε model. It is concluded that anisotropic effect of turbulence should be considered for simulating impinging diesel sprays.<br/>