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압력 조절 장치를 갖는 풍동 지면관에 관한 수치해석적 연구
이민재(M.J. Lee),김철완(C.W. Kim) 한국전산유체공학회 2010 한국전산유체공학회지 Vol.15 No.4
Preliminary design of a ground plate, a device installed close to the aircraft model for wind tunnel test to simulate the ground effect, was performed by a numerical simulation. A two-dimensional numerical study was pelformed initially to decide the optimal leading edge and flap configurations. Then, three-dimensional studies were conducted to decide the optimal flap deflection angle for pressure distribution reduction since the plate and the the plate supporting system generate static pressure difference between the upper and lower flow regions. Three-dimensional simulation additionally studied the effect of the clearance between the plate and the wind tunnel side wall. For the efficiency of computation, half model was simulated and a symmetric boundary condition was applied on the center plane. Based on the preliminary design, a ground plate was designed, manufactured and tested at the Korea Aerospace Research Institute(KARI) wind tunnel. The measured pressure differences versus flap deflection angle agreed well with the predicted results.
입력 조절 장치를 갖는 고정형 지면판에 대한 수치해석 및 풍동 실험
이민재(M. J. Lee),김철완(C. W. Kim) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.11
Numerical analysis is conducted for a fixed ground plate with pressure control device which is installed in the wind tunnel. Pressure difference is generated because of the ground plate having unisymmetrical structures between lower and upper space. The ground plate necessarily needs pressure control device in order to decrease pressure difference. This study considers two different heights away from wind tunnel bottom. CFD results show that increasing flap angle decreases the pressure difference. Based on CFD study, ground plate was designed and tested at the wind tunnel. The wind tunnel test result shows that the pressure control device can decrease the pressure imbalance and show pressure difference curve agrees to CFD result.