Abstract
초음속 유동하에서 측 추력기의 후방에 램프를 설치하였을 경우의 유통 현상을 실험 및 수치해석을 이용하여 해석하였다. 실험적인 방법으로, 가시화방법으로는 쉴리렌, 압력 측정을 위한 방법으로 압력 탭 (Pressure Tap), Pressure Sensitive Paint를 이용하였으며, 수치해석을 위하여 AeroSoft사의 GASP ver. 4.0을 사용하였다. 실험조건은 자유류의 흐름이 마하수 4 측 추력기와 자유류의 압력비가 532 이었으며 GASP을 사용하여 3D 램프형상에 대한 고찰을 하였다. 위의 모든 결과들은 후방의 램프가 없을 경우와 비교를 통하여 램프를 장착하였을 경우 수직력의 감소없이 피칭다운 모멘트가 70% 정도 감소함을 확인하였다. An experimental and computational study has been performed for investigation of the jet interaction in supersonic flow with a ramp located behind a sonic, lateral jet. The experimental techniques include schlieren, pressure taps, and Pressure Sensitive Paint. The numerical solver used in this study is AeroSoft's structured flow solver GASP Version 4.0. A Mach 4 crossflow with a pressure ratio of 532, and the 3D ramp was designed by parametric study using GASP. The results showed that the ramp located downstream of the jet decrese the nose-down pitching moment by 70% without a force loss.
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