强旋转受限射流的数值模拟

NUMERICAL SIMULATING FOR CONFINED STRONGLY SWIRLING TURBULENT FLOWS

将基于重整化群理论的ε方程与张健等提出的新代数应力模型（ＮＡＳＭ） 相结合，提出了重整化群代数应力模型（ＲＮＧＡＳＭ） 。同时运用Ｋε模型、ＮＡＳＭ 模型和ＲＮＧＡＳＭ 模型计算了强旋转受限射流，较为准确地预报了强旋转受限射流的回流区、轴向速度和切向速度，给出了６ 个湍流应力的分布，显示了强旋转受限射流流场的各向异性特点，同时对不同旋流强度的旋转流场进行计算。其结果与实验值吻合得较好。

In this paper, algebraic stress model with ε equation based on the Renormalization Group theory is put forward . Standard K ε model, algebraic stress model by Jiang Zhang [2] and present model (RNG ASM) are applied simultaneously to simulating the confined strongly swirling flow. The Simulating results by RNG ASM model are compared to the results by other two model, it is shown that the predictions by this model display reasonable agreement with experimental data, and lead to greater improvement than Zhang's ASM turbulence model [2] .