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비장착 엔진/나셀 형상에 대한 3차원 Euler 유동 해석
김수미(S.M. Kim),손창민(C.M. Son),양수석(S.S. Yang),이대성(D.S. Lee) 한국전산유체공학회 1996 한국전산유체공학회 학술대회논문집 Vol.1996 No.-
A reliable computational solver has been developed for the analysis of three-dimensional inviscid compressible flows around a nacelle of a high bypass ratio turbofan engine. The numerical algorithm is based on Godunov modified scheme to allow second order accuracy for space variables, while keeping the monotone features. Two step time integration is used not only to remove time step limitation but also to provide second order accuracy in a time variable. The multi-block approach is employed to calculate the complex flow field, using an algebraic grid solver, conformal grid solver, and elliptic grid solver. The exact solution of Riemann problem is used to define boundary conditions. The accuracy of the present method is validated by comparing its results for flows around the isolated nacelle in the cruise flight regime with the solution obtained using a commercial code "Rampant."