用温度梯度法测量壁面高温的研究

A study of measuring high temperature on the interior wall surface using temperature gradient method

直接测量液体火箭发动机燃烧室的内壁温度是十分困难的。提出了温度梯度法,即通过测量冷却通道中肋片上的温度梯度来推算出内壁面温度的方法。理论分析和数值计算表明,燃烧室冷却肋片中心截面的温度分布可以用一个三次方程来表示。用最小二乘法拟合测试数据可以推算出内壁面温度。

To directly measure the interior wall temperature of the liquid propellant rocket combustion chamber is very difficult. A temperature gradient method is presented for this purpose, that is, the interior wall temperature is eva- luated by means of the measured temperature distribution in the fin inside the cooling channel of the chamber. By analysis and numerical calculation, the tem- perature distribution in the fin is given as a cubic curve, the experimental data are fitted into it by the least square method and the interior wall temperature is de- duced.