436
P. Liu
Fig. 6.65 Free ballistic target equipment developed by China Pneumatic and
Development Center
Fig. 6.66 JF 12, an ultra-large hypersonic wind tunnel put into operation in 2012,
Chinese Academy of Sciences
6.8 Variable Density Wind Tunnel
1. Basic concepts
It is well known that in wind tunnel tests, by the similarity criteria,
it is generally required to meet the Mach number criterion considering
the compression effect and the Reynolds number criterion considering
the viscous effect. Because of the correlation between Mach number and
Reynolds number, the influence of these parameters cannot be studied
P. Liu
Fig. 6.65 Free ballistic target equipment developed by China Pneumatic and
Development Center
Fig. 6.66 JF 12, an ultra-large hypersonic wind tunnel put into operation in 2012,
Chinese Academy of Sciences
6.8 Variable Density Wind Tunnel
1. Basic concepts
It is well known that in wind tunnel tests, by the similarity criteria,
it is generally required to meet the Mach number criterion considering
the compression effect and the Reynolds number criterion considering
the viscous effect. Because of the correlation between Mach number and
Reynolds number, the influence of these parameters cannot be studied