三维引射流动数值模拟及紊流模型选择

The 3-D Numerical Simulation of Turbulent Jet Flow and the Selection of Turbulence Model

针对引射流动三维湍流流动的特点,应用k-ε、S-A以及k-ω湍流模型分别对三维引射流动进行了数值模拟.比较引射流量的数值结果与实验结果表明,湍流模型的选取对数值结果具有较大影响,采用k-ω模型进行模拟可以较为准确地预测引射流量.

The amount of the mass flow of the jet flow is the main performance index of the exhaust injection cooling system of gas turbine and in engineering it is very important to precisely predict the mass flow of the jet flow. Based on the property of the three-dimensional turbulence flow inherently existed in the jet flow, three kinds of turbulence model, standard k-ε model, Spalart-Allmaras model and k-ω model were used separately in the flow simulation . The numerical results obtained based on the three turbulentce models were compared respectively with the experimental ones. The results show that the selection of the turbulence model has great influence on the amount of the mass flow of the jet flow and the k-ω turbulence model should be recommended to predict the jet flow.