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为了准确测量水射流冲击冷却过程靶面热流密度,提出在靶体背侧增加绝热材料,采用单点测温,使用一维导热反问题计算靶体表面热流密度的方法.实验数据分析显示,采用该方法对靶体背侧温度预测的相对误差±5%以内的概率为93%以上,由于靶体背侧仅是近似的绝热条件,导热反问题计算的靶体背侧温度略高于实测温度.结果表明,通过在靶体背侧增加绝热材料,即便采用单点测温,仍然可以很容易地获得足够精确的靶体温度和表面热流密度.
In order to accurately measure the heat flux of the target surface during water jet impingement cooling process, a method of adding heat-insulating material to the backside of the target and using single-point temperature measurement to calculate the heat flux density of the target surface using a one-dimensional inverse heat conduction problem is presented. The probability of the method that the relative error within ± 5% of the prediction of the dorsal temperature of the target is more than 93%. Since the dorsal side of the target is only an approximate adiabatic condition, the dorsal temperature of the target calculated by the inverse thermal conductivity problem is slightly higher than the measured temperature The results show that by adding a thermal insulation material to the backside of the target it is still easy to obtain sufficiently accurate target body temperature and surface heat flux even with a single point temperature measurement.