【摘要】 为了验证高热负荷下超临界压力航空煤油对金属实验段的冷却特性，通过数值模拟的方法获得了实验的相关工况，讨论了冷却水质量流量对实验段壁面内传热的影响，实验验证了冷却燃油质量流量对冷却效果的影响、实验段燃气侧壁面温度分布情况，仿真模拟了实验段入口燃气温度分布对壁面冷却效果的影响。得出如下结论：每个冷却燃油质量流量都存在一个对应的冷却水质量流量，使得实验段的水冷通道对燃油冷却的影响最小；随着冷却燃油质量流量增加，燃气侧平均温度和最高温度逐渐减小；实验数据显示，在实验段主流燃气平均温度为904 K的条件下，冷却燃油质量流量为0.09 kg/s的最大值时，实验段燃气侧壁面最高温度可降至539 K，实验测量值略高于相应位置的仿真值，仿真误差在12%以内，并将燃气侧壁面最高温度和单位面积燃气侧壁面所需的冷却燃油质量流量间的关系拟合成经验关系式；在实验段入口2 200 K燃气作用下，燃气侧壁面温度先急剧降低、后略微升高，超临界压力燃油可将金属壁面温度控制在920 K以下。更多还原

【Abstract】 To validate the cooling characteristics of supercritical pressure aviation kerosene on metal test sections under high thermal loads, numerical simulations were employed to obtain relevant experimental conditions. The influence of cooling water flow rate on the heat transfer within the test section walls was discussed. The experiments verified the impact of cooling fuel flow rate on the cooling effectiveness and the temperature distribution on the gas-side wall of the test section. Simulations were conducted to model the effect of gas inlet temperature distribution on the wall cooling performance. The following conclusions were drawn: for each cooling fuel flow rate,there existed a corresponding cooling water flow rate that minimized the impact of the water cooling channel on fuel cooling. As the cooling fuel flow rate increased, both the average and maximum temperatures on the gas side gradually decreased.Experimental data showed that under an average mainstream gas temperature of 904 K in the test section,when the cooling fuel flow rate reached its maximum value of 0.09 kg/s,the highest wall temperature on the gas side can be reduced to 539 K. The experimental values were slightly higher than the corresponding simulation values, with a simulation error within 12%, and the relationship between the maximum temperature of the gas side wall surface and the required cooling fuel flow per unit area of the gas-side wall surface was fitted into an empirical formula. Under the influence of 2 200 K gas at the test section inlet, the gas-side wall temperature first decreased sharply and then slightly increased. Supercritical pressure fuel can control the metal wall temperature below 920 K.更多还原