【摘要】 为深入认识再入物理现象 ,在弹道靶上做了模型头部和近尾流红外辐射测量。发射器为 1 4.5mm口径的二级轻气炮 ,模型为1 0mm的球 ,材料为聚碳酸酯和铝 ,模型发射速度 4～6km/s,使用红外InSb探测器测量波长 3～ 5 .4μm的红外辐射 ,靶室压力 5 .32kPa。实验中使用光电法测量模型速度 ,两站阴影照相进行模型姿态监测和速度核实。实验结果表明 :球模型的红外辐射强度强烈依赖于模型材料和模型飞行速度。对不同材料模型头部和尾流部辐射强度的定性比较说明由于低温材料烧蚀产物的存在 ,极大地增强了头部和近尾流区的辐射强度 ,而且延长了尾流辐射长度更多还原

【Abstract】 The infrared radiation measurements of head and near wake of models were carried out in ballistic range for studying of reentry physical phenomenon. The launcher was a two-stage light gas gun with the bore of 14.5mm. The sphere models with diameter of 10mm were made from polycarbonate and Aluminum separately. The flight velocities of the models were about 4～6km/s, InSb detectors were used for measurement of IR radiation with sensitive wavelength were 3～5.4μm. The pressure in the range is 5.32kPa. During the experiment, the model velocity was measured through photo-electronic devices and two stations of shadow graph monitor the model attitude and provide velocity check.The experiment results show that IR radiation of sphere models strongly depends on model’s material as well as flight velocity. IR radiation of polycarbonate models greatly increased as the ablative products entering the wake.更多还原