【摘要】 本文对轿车尾部的分离流进行了数值计算和研究。通过SGS(亚网格尺寸比)湍流模型,用瞬态三维N-S方程对具有不同尾部外形的汽车流场进行了全模拟。本文论述了计算所得的非稳态流场的时均值。通过计算结果与风洞实验和水槽实验数据的对比分析验证了该计算的有效性和可靠性。更多还原

【Abstract】 Separated flow around after-body of automobile is numerically calculated and studied. 3-dimension, time-dependent full Navier -Stokes equation simulation using SGS (Sub-Grid "Scale) turbulence model is carried out for automobile with various after-body configuration. The time-average of the unsteady flow-field obtained in the computation is discussed. The computed results are verified by comparison with experiment in the wind tunnel and water-basin, which shows the computation is reliable and effective.更多还原