利用能量最小多尺度模型预测圆射流的速度分布

Prediction of Velocity Distribution of Round Jet Using an Energy-Minimization Multi-Scale Model

将能量最小多尺度(EMMS)模型拓展到圆射流的研究.利用圆射流的稳定性条件,预测圆射流的流速分布.分析表明,湍流圆射流的速度分布指数为1.94.通过与实验结果的对比分析,EMMS模型的平均误差和最大误差分别是-0.69%和-10.57%,低于传统的Gauss分布解、Tollmien解和G?rtler解.

The energy minimization multi-scale（EMMS）model was applied to the round jet.The stability condition of the round jet was adopted to predict the velocity distribution of the turbulence circular jet.Studies show that the velocity distribution indice of the turbulent round jet is 1.94.The velocity distributions predicted by the EMMS model give a maximum deviation of-10.57% and a mean deviation of-0.69% compared with the published experimental data,which is lower than those obtained by the Gauss distribution,Tollmien and G？rtler solution.