Numerical Analysis of a Scaled CRM Wing at Mach 0.85: Grid Sensitivity and Turbulence Model Evaluation

The Common Research Model (CRM) wing is a widely used reference model in aerodynamics research for aircraft design. This study investigates the aerodynamic performance of a scaled-down CRM wing at Mach 0.85 under transonic flow conditions using ANSYS Fluent 2023. This paper presents a novel numerical investigation that systematically assesses the influence of grid size on the numerical results. Additionally, the performance of six different turbulence models is comparatively analysed. The K-epsilon model showed a validation error of 2.7, indicating accurate prediction of drag. The findings support the transonic flow analysis of the CRM wing. This research provides useful aerodynamic data for researchers working in nacelle flow analysis and geometry optimization.