超临界压力下航空煤油流动与传热特性试验

本文针对超燃冲压发动机再生冷却系统运行条件,实验研究了大庆RP-3煤油在超临界压力下的流动和传热特性,目的在于研究煤油在各种工况下的流动参数变化以及对流传热规律。煤油通过二级煤油加热/输运系统加热,试验的煤油压力约2.6M～5.0MPa,油温约300～800K。相应的壁面热流密度为10～300kW/m2。通过油温与壁温的同步测量,结合非定常传热分析,获得了超临界压力下、亚/超临界温度范围内煤油的流动和传热物理参量的变化曲线。

Experiment on convective heat transfer of aviation kerosene under supercritical pressures

In this paper,characteristics of the convective heat transfer of aviation kerosene were studied experimentally under supercritical pressure according to the conditions in a regenerative cooling system for the scramjet application. A two-stage kerosene heating system was used to heat the kerosene up to temperature of 300~800K at pressures of 2.6~5.0 MPa. The corresponding wall heat flux varied from 10 kW/m2 to 300kW/m2. By simultaneously measurements of the local fuel and wall temperatures,the heat transfer ...