비정상RANS법과 중첩격자계를 이용한 횡파중 선박운동 수치해석
Numerical Analysis of Ship Motions in Beam Sea Using Unsteady RANS and Overset Grid Methods
박일룡(동의대학교); Seyed Hamid Sadat Hosseini(The University of Iowa); Frederick Stern(The University of Iowa)
45권 2호, 109~123쪽
초록
The present paper presents the CFD result for a beam wave test case. An ONR tumblehome ship model with bilge keels is used. The beam wave test is for zero forward speed and roll and heave 2DOF with wave slope ak =0.156 and wavelength λ =1.12LPP , with LPP the ship length. The problems is solved numerically with an unsteady Reynolds averaged Navier-Stokes approach. The free surface flow is computed using a singlephase level-set method and the motions in each time step are integrated using a predictor-corrector iteration approach which uses dynamic overset grids moving with relative ship motion. The predicted CFD results for motions and forces are compared with experimental data, showing a reasonable agreement.
Abstract
The present paper presents the CFD result for a beam wave test case. An ONR tumblehome ship model with bilge keels is used. The beam wave test is for zero forward speed and roll and heave 2DOF with wave slope ak =0.156 and wavelength λ =1.12LPP , with LPP the ship length. The problems is solved numerically with an unsteady Reynolds averaged Navier-Stokes approach. The free surface flow is computed using a singlephase level-set method and the motions in each time step are integrated using a predictor-corrector iteration approach which uses dynamic overset grids moving with relative ship motion. The predicted CFD results for motions and forces are compared with experimental data, showing a reasonable agreement.
- 발행기관:
- 대한조선학회
- 분류:
- 조선공학