【摘要】 用DLR型k ε紊流模型·BFC法对锥形渐扩管内紊流的 3种算例进行了数值计算 ,计算结果表明紊流耗散率入流边界条件壁面值εin ,w对主流动方向时均速度 u、紊流动能k和涡动粘性系数υt 在流路中心分布的影响较大 ,而对ε分布的影响较小。更多还原

【Abstract】 DLR k ε turbulece model·BFC method was used to conduct numerical calculation for three calculated examples of turbulent flow on a conical diffuser.The results of calculation showed that the wall value ε in,w of the inlet boundary condition of turbulent dissipation ratio had considerable influence on the distribution of longitudinal velocity ,turbulence energy k and eddy viscosity υ t in the centre of flow field but less influence on ε distribution.更多还原