气淬过程中换热系数的数值模拟

Numerical Simulation of Heat Transfer Coefficient During Gas Quenching Process

为了研究淬火时流体与工件的对流换热,用计算流体的数值方法(CFD)对空气喷射平板探头的淬火传热过程做了模拟计算,得到了流体与平板探头之间的随平板温度和平板表面位置变化的换热系数,与试验结果比较吻合,应用模拟计算可简单准确地了解气体淬火传热过程,为制定气淬工艺提供参考依据,应该成为气淬过程重要的研究手段。

In order to study convection heat transfer between fluid and workpiece during gas quenching, the process of air-jet quenching with a flat probe was simulated using the computational fluid method （CFD）, The heat transfer coefficient between fluid and the flat probe was obtained, which was changed with temperature and surface location of the fiat. The result of the numerical simulation consists with the experimental data, The numerical simulation method may easily and exactly comprehend the heat wansfer process during gas quenching and offer reference for gas quenching process, It should be an important method to study gas quenching process.