analysis on the flow state's influence to the heating of hypersonic glide vehicle

Paper number

IAC-09.C2.I.14

Author

Dr. Jian-xia LIU, National University of Defense Technology, China

Coauthor

Prof. Zhong-xi HOU, National University of Defense Technology, China

Year

2009

Abstract

Hypersonic Glide Vehicle (HGV) has become a hot topic in the aerospace field nowadays, with the advantages of its high speed, good break-defense capability and so on. In order to promote HGV into practice, forecasting the heating characteristics of the vehicle is the precondition for the design of its thermal protection system. Due to the vehicle's special pneumatic configuration and flight trajectory, the flow state on the surface is quite different from the traditional hypersonic vehicle, and may have untraceable effect on the aerodynamic heating of HGV. Based on the investigation of flow state on the vehicle's surface along the skip-glide trajectory, the paper analyses the aerodynamic heating of HGV under different situations and different flow state, with estimation techniques and numerical simulation. Based on the instant radiation equilibrium assumption, the paper obtains the upper and lower surface's heat flux and temperature distribution.

    According to the results, some conclusions can be obtained. For example, laminar flow is the major state on HGV's surface during its hypersonic flight, but transition phenomenon may take place at the tail of lower surface. The closer it is away from the nose, the more serious the surface's heating situation would be. Furthermore, the aerodynamic heating of lower surface is more serious than the upper. On the assumption of laminar flow, the heat flux is below 100,000 Walt per square meters on most regions of the upper surface at the trajectory point where the heating situation is serious. Meanwhile, the heat flux on most regions of the lower surface is below 1,000,000 Walt per square meters. Nevertheless, the heat flux of upper and lower surface at the trajectory point with mitigatory situation is almost the same. Compared with the laminar flow state, the heating on the lower surface is quite serious while the flow is turbulent. Thus it is quite necessary to make a detailed investigation on the flow state of HGV's lower surface.

Abstract document

IAC-09.C2.I.14.pdf

Manuscript document

(absent)