统一二阶矩模型用于模拟旋流湍流两相流动

用统一二阶矩模型（ＵＳＭ）模拟了旋流数为０４７和１５的气粒两相流动，并和实验结果以及ｋ ε ｋｐ模型的模拟结果进行了对比．研究结果表明，提高旋流数减小了轴向速度反流区，增大了切向速度似固核区．ＵＳＭ和ｋ ε ｋｐ模型预报旋流数为０４７时的两相速度场差别不大，并都和实验结果接近，但前者预报的旋流数为１５的两相速度场比后者有改进，在两种情况下，前者都能揭示出后者无法预报的两相湍流各向异性规律．

SIMULATION OF SWIRLING GAS PARTICLE FLOWS USING THE UNIFIED SECOND ORDER MOMENT MODEL 1)

Numerical simulation of swirling gas particle flows are carried out for the development of innovative cyclone separators, hydrocyclones, cyclone furnaces and swirl burners in our laboratory, using two fluid models. The key problem in two fluid models is the two phase turbulence model. The two phase turbulence in swirling flows is obviously anisotropic. The isotropic k ε k p model proposed by us can give reasonable two phase velocity fields in case of swirl number s =0 47, but cannot predict ...