一种近壁理论湍流模型初探
Initial Study of a Theoretical Near-Wall Turbulence Model
-
摘要: 在传统的k-ε湍流模型基础上,在近壁区放弃求解ε方程而代之以根据共振三波理论模型在近壁区系统计算的ε值构成封闭,通过对NACA0012二维翼形流场的计算,初步验证并适当修正了新的理论模型,由于注意到了理论模型计算结果的无量纲性,从而改善了该流场的计算结果,得到了与实验更为相符的Cp分布。本文的分析还表明,逆压力梯度对ε的影响非常显著,验证了理论分析和计算得到的结论。Abstract: Based on the classic k-ε turbulence model,ε equation is replaced by a theoretical model which formed a near-wall turbulence model.The calculation of the 2-D NACA0012 airfoil in low Reynolds number flow field validated the theoretical model.The non-dimensional property of the result obtained from the theoretical model improves the calculation,so the distribution of C_pagrees better with experimentation.The analysis shows that the effect of converse pressure gradient on ε is prominent,and it validates the result of theoretical and numerical computation.
-
点击查看大图
计量
- 文章访问数: 1438
- HTML浏览量: 1
- PDF量: 448
- 被引次数: 0
下载: