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常压高速氮气淬火是利用高速氮气对工件进行快速冷却的工艺,通过淬火冷却设备流场边界条件实验,得到了不同工况下淬火冷却设备的流场边界条件,建立了淬火冷却设备的三维流场模型以及网格模型,根据有限体积法,结合边界条件实验结果进行了三维湍流速度场的数值计算,并将速度场计算结果与边界条件实验结果进行了对比分析研究.研究结果表明,淬火冷却设备中氮气的流场在淬火开始瞬间是定常、不可压缩湍流场,工件的加入会影响氮气的速度场的分布,数值模拟得到的结果与实测值比较吻合.
Atmospheric high-speed nitrogen quenching is the process of rapidly cooling the workpiece by high-speed nitrogen. The flow field boundary conditions of quenching and cooling equipment under different working conditions are obtained through experiments of flow field boundary conditions of quenching and cooling equipment, and the three-dimensional flow of quenching and cooling equipment is established Field model and grid model, the numerical calculation of 3D turbulent velocity field is carried out according to the finite volume method and the experimental results of the boundary conditions, and the results of velocity field calculation and boundary conditions are compared and analyzed.The results show that quenching and cooling The flow field of nitrogen in the equipment is a steady and incompressible turbulent flow field at the beginning of quenching. The addition of workpieces will affect the distribution of nitrogen velocity field. The numerical simulation results are in good agreement with the measured values.