Developing and applying Mach 4.5 nozzle in hypersonic wind tunnel Ju HUANG, Yongneng YANG, Qi LIU, Haibin YANG and Wei ZHANG JNWPU, 39 5 (2021) 1064-1069 Published online: 14 December 2021 DOI: 10.1051/jnwpu/20213951064