Numerical Comparison of Drag Coefficient between Nacelle Lip-Skin with and without Bias Acoustic Liner

Abstract

The paper demonstrates the drag coefficient on the nacelle lip skin with and without bias acoustic liner. It is acknowledged that bias acoustic liner potentially reduces the drag coefficient and enhances the fuel efficiency of the aircraft. In the present study,the geometric mesh modelling of nacelle lip-skin has been developed using GAMBIT pre-processor, and FLUENT 14.0 CFD code is employed to obtain the numerical results. According to the results, drag coefficient of nacelle lip reduces by 90.5% with bias acoustic liner as compared to drag coefficient of nacelle lip-skin without bias acoustic liner. Therefore, bias acoustic liner with bias flow has potential to reduce the drag coefficient apart from being utilized in hot air anti-icing.