Abstract
초음속 유동장 내에 돌출된 핀에 의해 발생하는 바닥면의 열전달 특성 변화 연구를 수행하였다. 마하수가 3이고, 레이놀즈수가 <TEX>$5{\times}10^7$</TEX>인 초음속 유동내에 받음각이 <TEX>$12.5^{\circ}$</TEX>부터 <TEX>$20^{\circ}$</TEX>인 기울어지지 않은 형태의 선단이 날카로운 핀(sharp fin)을 돌출시켜 충격파를 발생시켰다. 이로 인해 생기는 바닥면의 열전달 계수의 변화를 적외선 카메라를 이용한 온도 분포의 측정을 이용하여 계산하였다. 또한 바닥면 유동의 흐름을 파악하기 위해 수치해석과 유막법이 수행되었다. Heat transfer characteristic near a sharp fin was studied in a supersonic flow. Mach number and the Reynolds number were 3 and <TEX>$5{\times}10^7$</TEX> respectively. Infra-red thermography was used to obtain the variation of surface heat transfer coefficient distribution. The angles of attack were ranged from <TEX>$12.5^{\circ}$</TEX> to <TEX>$20^{\circ}$</TEX> and the numerical analysis and the oil flow method were conducted to understand flow fields near a sharp fin.
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