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Seungwon Ha,Hiroki Nagai,Keisuke Asai,Kazuyuki Nakakita,Nobuyuki Tsuboi 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
A blunt body in hypersonic flow is subjected to severe aerodynamic heating and drag. This is one of the most critical problems of designing the hypersonic vehicles such as Reusable Launch Vehicles (RLV). It is well known that spiked-nose (aerospike) concept is effective for aerodynamic drag reduction on asymmetric blunt bodies in hypersonic flow. In this study, we investigated the heat flux distribution on a blunt-nosed body with an aerospike in hypersonic flow. The spike length and the angle of attack were changed to verify the heat reduction effect. The experiment was conducted at Mach l0in the JAXA 0.44-m Hypersonic Wind Tunnel and the temperature of body was measured by using Temperature-Sensitive Paint (TSP), which is a global temperature measurement technique based on photochemical reaction. In addition, the heat flux distribution calculated increase rate or temperature. The flow field around a blunt-nosed body is visualized by schlieren images and compared with TSP images and CFD results to discuss the heat flux distribution. It was found from the result that the heat flux amount is decreased as the length of spike longer and the heat flux distribution is changed widely with the angle of attack. In this study, moreover, the heat-flux and the flow field relation ware clarified by shock/shock interaction analysis of the flow field for different angle-of-attack.