论文部分内容阅读
为比较Standardκ-ε模型、RNGκ-ε模型、Realizableκ-ε模型用于水轮机数值模拟时的异同,采用三种κ-ε模型对不同工况下带有副叶片的混流式水轮机转轮进行了三维定常湍流数值模拟,流场求解使用分离式解法,压力场求解使用SIMPLEC算法。结果表明,三种κ-ε模型用于水轮机的数值模拟具有一定的准确性和适用性,在相同模拟条件下都可得出与实际流态大致吻合的结果,但在计算量、捕捉流动细节及计算精度等方面存在差异,可为水轮机数值模拟研究中κ-ε模型的选择提供参考和依据。
In order to compare the similarities and differences between Standard κ-ε model, RNG κ-ε model and Realizable κ-ε model for turbine numerical simulation, three kinds of k-ε models were used to simulate the runners of Francis turbine with secondary blades under different working conditions. The steady turbulent numerical simulation, the flow field solution using the separate solution, the pressure field solution using the SIMPLEC algorithm. The results show that the three κ-ε models have some accuracy and applicability for the numerical simulation of hydraulic turbines. Under the same simulation conditions, the results are in good agreement with the actual ones. However, And the accuracy of calculation. It can provide reference and basis for the choice of κ-ε model in the numerical simulation of turbine.