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해머헤드 형상 주위 압력 섭동 해석에 영향을 미치는 수치적 요인 분석
채민기(M.G. Chae),박수형(S.H. Park),배재성(J.S Bae) 한국전산유체공학회 2017 한국전산유체공학회지 Vol.22 No.2
The pressure perturbation analysis was performed using RANS(Reynolds-Averaged Navier-Stokes) and DDES(Delayed Detached Eddy Simulation) turbulence models. Only the DDES model could capture the pressure perturbation caused by the instability of the shear layer at the boattail of the hammerhead launch vehicle. In order to improve the resolution of the vortex shedding, the sensitivity analysis was performed according to the spatial discretization schemes using Roe-MUSCL, WENO5, and C-WENO5 scheme with lower numerical viscosity. Better resolution of the vortex shedding around the boattail can be obtained by applying higher-order spatial schemes. The grid convergence study also showed the same tendency.