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本文对顶吹气体射流冲击下熔池内的液体流扬,将物理模型的试验测定,与数学模型方程的数值求解相配合进行了研究。用激光测速仪测定了模型熔池液流的速度分布。以湍流的运动学和动力学方程、Prandtl—Kolmogorov湍流单方程模型,以及物理模型试验测定提出的边界条件,构成了所研究问题的数学模型。应用Spalding等计算湍流回流的方法,对数学模型数值求解,得到了熔池内液流流函数、速度、涡量、湍动能,湍流旋涡粘性系数等的分布,计算结果与实验测定相当吻合,并可见本文的工作比之前人的有了进一步的改善。
In this paper, the flow of liquid in the molten pool under the impingement of top-blowing gas jet is studied. The experimental determination of the physical model is carried out with the numerical solution of the mathematical model equation. The velocity distribution of the model molten pool flow was measured by laser gun. The kinematic and kinetic equations of turbulence, the Prandtl-Kolmogorov turbulence equation and the physical model test are used to determine the boundary conditions, which constitute the mathematical model of the studied problem. Spalding and other methods to calculate turbulent backflow were used to numerically solve the mathematical model. The distributions of liquid flow function, velocity, vorticity, turbulent kinetic energy and turbulent vortex viscosity in the molten pool were obtained. The calculated results are in good agreement with the experimental results and can be seen The work of this article has been further improved than the previous one.