典型弱浮力环境下导线绝缘层的着火先期特性  

Fire Initiation Characteristics of Wire Insulation in Representative Weakly Buoyancy Environment

作　　者：汪凯[1,2] 夏伟[1,2] 王宝瑞[1] 孔文俊[1] 

机构地区：[1]中国科学院工程热物理研究所 中国科学院轻型动力重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《空间科学学报》2016年第4期501-507,共7页Chinese Journal of Space Science

基　　金：中国科学院空间科学战略性先导科技专项项目资助(XDA04020202-08;XDA04020408)

摘　　要：根据实践十号(SJ-10)科学卫星导线特性箱有效载荷的地面低压模拟实验,通过搭建低压微重力模拟实验台,研究了典型低压弱浮力(3kPa)环境下不同绝缘层种类、厚度和过载电流对导线绝缘层着火先期特性的影响.实验获得了导线绝缘层着火先期的温升特性和烟气析出特性,并根据对比常压(1 atm)下绝缘层着火先期特性的结果,初步预测了微重力条件下卫星在轨飞行绝缘层的着火先期特性,低压实验结果为SJ-10卫星空间实验工况优选提供了重要依据.This paper introduce the ground-based low pressure simulation tests of the Wire Insulation characteristic box that will aboard on SJ-10 scientific satellite（SJ-10）.An experimental system with reduced pressure is established to simulate the microgravity environment.The effects of insulation type,insulation thickness and amplitude of the overloaded current on fire initiation characteristics of wire insulation have been investigated at the representative 3 kPa environmental pressure.The temperature rise trend and the smoke emission characteristics of wire insulation during fire initiation are obtained.Compared with the results obtained at the normal pressure（1 atm）,the fire initiation features of wire insulation as the satellite fly in orbit,namely it is at 3 kPa pressure,is predicted.The results provide important references for the choice of space experimental conditions in SJ-10 satellite.

关 键 词：微重力 弱浮力 绝缘层 着火先期特性 

分 类 号：V524[航空宇航科学与技术—人机与环境工程]