中文摘要：

使用中国空气动力研究与发展中心（CARDC）再入物理弹道靶和双狭缝式辐射计测量了多个状态的高超声速无烧蚀钢球模型非平衡流场的可见光辐射强度，并对实验技术和方法进行了讨论和分析。测量波段中心波长位于可见光的绿光波段（517．8nm、519．8nm），半宽度为6．6nm。球模型飞行速度为4．8～5.7km／s，靶室压力1333～10666Pa。实验数据与文献和计算结果一致，并发现高靶压状态辐射强度峰值下降的拖尾现象，其原因尚待分析。

英文摘要：

The nonequilibrium radiant intensities of a non-ablation hypersonic spherical steel model in visible light have been obtained under several conditions, and the experimental techniques have been analyzed. The experimental facility is a ballistic range with a 25mm two-stage light gas gun in CARDC. A double-slit visible-light radiometer is used with the central wavelength located in the band of green light （517.8nm and 519.8nm） and the half-width is 6.6nm. The model＇s flight velocity is 4.8 -5.7km/s, and the chamber＇s pressure is 1333 - 10666Pa. Results are good compared with the data of references and computation. A trailing phenomenon is found in experimental data of the case in higher chamber＇s pressure and the reason is unknown.