Numercal Simulation of Unsteady Performance for 20D Surface Effect Airfoils

J. Ocean Eng. Technol. 1995;9(2):71-74.

Park Il-Ryong,Jeon Ho-Hwan

2차원 해면효과익의 비정상 성능에 대한 수치적 시뮬레이션

박일룡,전호환

부산대학교 조선해양공학과,부산대학교 조선해양공학과 기계기술 연구소

Keywords: WIG, Unsteady, Potential flow, Source and vortex distribution, wake, Lift

핵심용어: 해면효과의, 비정상, 포텐셜 흐름, 소오스와 볼텍스 분포, 반류, 양력

Abstract

A numerical model capable of simulating a 2-D airfoil flying over in the vicinity of the waves is discussed. Instead of treating the problem as a heaving oscillation one above the rigid flat wall, sources are distributed on the prescribed wave profile. The wave deformation due to the airfoil is assumed to be negligible and treated as a rigid undulated wall. The source and vortex are distributed on the surface of the foil. It is found that the variation of $C_L$ with wave steepness in severe and that the lift variation due to waves decreases as the wing height above the water surface increases.