하이퍼튜브 캡슐차량 아진공 튜브내부 아음속 주행시 공기유동 및 압축파/충격파의 비정상상태 거동 분석

초록

The aerodynamic flow and compression wave & normal shock behavior around capsule train which is moving with subsonic speed(Mach < 1.0) in partial vacuum(100 Pa(0.001 atm)) tube are numerically analyzed. 2D-1D different kinds of domain are combined together to solve the flow and pressure fields in the 40,000 m, long-range tube in which length of 2D and 1D domains are 700 m and 39,300 m, respectively. The compression wave is generated in fore region of capsule train and normal shock is generated in rearward region. Supersonic flow is created in the rear edge of capsule train by normal shock which is caused by choking flow between tube wall and capsule train. The enduring lengths of pressure disturbance due to compression wave and normal shock are about 900 m in the fore region and 400 m in rearward region, respectively. The aerodynamic drag is exponentially increased and about 50N at Mach = 0.3(100 m/sec) and 380N at Mach = 0.88(300 m/sec).

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