用RNG K-E模式数值模拟180°弯道内的湍流分离流动
NUMERICAL CALCULATION OF TUBULENT SEPARATED FLOWS IN 180 DEG DUCT WITH RNG K ε TUBULENCE MODEL
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摘要: 将Ｙａｋｈｏｔ与Ｏｒｓｚａｇ新近提出的ＲＮＧＫ－ε湍流模式推广应用于１８０°强曲率弯道内的湍流分离流动的数值模拟，计算在任意曲线坐标下进行，并采用速度协变分量作为求解变量以保证计算的高度稳定性，控制方程的求解采用通常的控制容积法，文中给出了详细的数值计算结果，并与实验结果进行了比较，结果表明，ＲＮＧＫ－ε湍流模式能有效地模拟有强曲率影响的湍流分离流动，展示了这一模式在工程湍流计算中的前景
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关键词:
- RNGK－ε湍流模式 /
- 湍流分离流动 /
- 强曲率道 /
- 任意曲线坐标系 /
- 协变分量
Abstract: A two equation turbulence mode of K ε type was recently derived by Yakhot and Orszag on Renormalization Group (RNG) methods.It was applied to solve the turbulent separated flows in a 180 deg duct.The scheme has been developed for a generalized coordinate system and in based on a control volume approach with a staggered grid arragement.The physical covariant velicity components are selected as the dependent variable in the momentum equations.The detail numerical results were given and compared with th... -
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