수면비행선박 착수 조건에 대한 CFD-MBD 연성해석 및 운항시험 결과 비교

Abstract

In this study, 2-way coupled computational fluid dynamics (CFD) and multi-body dynamics (MBD) analysis has been performed for the water-landing condition of a wing-in-ground (WIG) effect ship model. Unsteady multi-phase fluid dynamic analysis based on Navier-Stokes equations and Lagrangian approach is performed adopting overset mesh technique in order to effectively simulate the dynamic behavior of a WIG ship. Actual flight test data for a typical water-landing condition provided by the WIG ship manufacturing company are well compared with results by the present numerical approach. It is shown that a high-fidelity numerical model can accurately predict the dynamic behavior of a WIG ship even considering the mutual effect of air and sea-water. Using the proposed numerical approach, time-dependent load variation imposed on each section of hull bottom surface as well as water landing performance of a WIG ship can be accurately analyzed and investigated in detail.