建立了由内部一点测量温度值,选取多个时间步长计算未知的表面热流密度与换热系数的导热反问题算法。该算法采用有限容积法离散方程,附加源项法处理边界条件。将该计算模型应用于求解浸没水射流冷却过程中表面热流密度,将计算温度值与实验测温值进行比较验证了算法的正确性。在此基础上分析了水射流冲击过程中薄钢片表面热流密度随表面温度与时间的变化特性。 The inverse heat conduction problem with unknown surface heat flux and heat transfer coefficient was established by measuring the temperature inside a bit and selecting multiple time steps. The algorithm uses the finite volume method of discrete equations, additional source term method to deal with the boundary conditions. The calculation model is applied to solve the surface heat flux density in the submerged jet cooling process. The calculated temperature is compared with the experimental temperature value to verify the correctness of the algorithm. Based on this, the variation of surface heat flux with surface temperature and time during the impact of water jet was analyzed.