Flow analysis of 3-Dimensional Power-Augmented Ram Wing in Ground Effect

J. Ocean Eng. Technol. 1997;11(1):55-64.

3차원 PAR WIG (Powder Augmented Ram Wing in Ground Effect) 의 수치연구

곽승현

한라공과대학교 조선공학과

Keywords: PAR, Power-Augmented Ram, Ground Effect, Wing, navier-Stokes, NACA 0012, Lift

핵심용어: 지면효과, 날개, 나비에스토크스, 양력, 항력, 압력계수

Abstract

A wing operating in close proximity to the ground exhibits a reduction in induced drag, which increase the lift/drag ratio. The poert-augmented ram (RAR) phenomenon involves directiing the efflux from forward mounted propulsion ststem under the wings, with the efflux nearly stagnated under the wings. In the present paper, 3 dimentional PAR was numerically studied by solving the Navier-Stokes equations. Pressure distribution and velocity vectors are calculated around the wing surface and the ground. Through the numerical simulation, Cp values and lift/drag ratio are carefully reviewed by changing the height/chord; 0.05, 0.1, 0.3 and 0.8. The shape of model is NACA 0012 with a span/chord ratio of 3.0. According to the numerical results, the relationship between lift/drag and height/chord is fairly reasonable.