Aerodynamic Performance Analysis of Rough Rectangular Aircraft Wing for Subsonic Flow

Abstract

: Present research aims to analyze the effect of surface roughness on the aerodynamic performance of aircraft wing. Sand grain roughness was introduced over the wing surface through Computational Fluid Dynamics (CFD) tool. Surface roughness effect was reported at two different plane velocity one of them lies in the range of incompressible flow while other is in the range of compressible flow regime. Turbulences were modeled throughk   realizable and k   SST model for incompressible and compressible flows respectively. CFD simulation results estimated that drag increases and lift decreases with increase in roughness height for incompressible flow. In case of compressible flow, analysis results showed that increase in roughness height causes significant increment in drag along with some increase in lift force. On the basis of obtained results it is concluded that wing performance is highly sensitive to roughness along with that it is also analyzed that increase in roughness height causes decrease in lift to drag ratio