救生舱高温环境的传热研究

Research into Heat Transfer to Refuge Chamber from External

为提高救生舱热防护能力,延长救援时间,在空载状态下救生舱热载荷研究的基础上,提出救援状态下救生舱外部传热热负荷的量化方法。已知救援状态下救生舱内、外温度随时间变化曲线,拟合温度函数。依据温度变化特点划分区间,积分求取各区间上温度平均值,计算温差,由传热方程计算救援状态下救生舱的热载荷。以某型号救生舱载人综合防护试验为例,根据模拟灾变环境的温度变化特点,运用该方法计算最高温度与常态温度下外部高温空气向舱体及其内部空间传热的热载荷,得到救生舱的总热负荷,外部传热最大传热功率及救生舱热载荷负荷范围。

For the sake of improving refuge chambers＇ thermal protection, a calculation method of heat transfer from external was worked out based on research into the heat load under unloaded condition. Given these characteristics of lethal-environment temperature and temperature variation curve, temperature function was fitted. Intervals of the function were divided according to characteristics of temperature varia- tion. Average temperature of each interval was computed by integration. The temperature difference was calculated. Then, total heat load of the chamber under the full-load condition was computed via heat transfer function. A real experiment was conducted with a certain refuge chamber and with this method, heat transfer from external and total heat load of the refuge chamber were computed according to character- istics of temperature variation curve in each interval of the function, and then numerical range of thermal load caused by heat transfer from external was computed, which influence and thus decide air-condition＇s work power inside.