CREATE~™-AV Kestrel Dual-mesh Simulations of the NASA Common Research Model

摘要

We use NASA's Common Research Model and initial conditions from the sixth Drag Prediction Workshop (DPW VI) to investigate CREATE~™-AV Kestrel's ability to accurately compute the drag coefficient for a transport aircraft. We leverage Kestrel's enhanced dual mesh capability to wrap the near-body, unstructured mesh with a higher-order Cartesian background. The dual-mesh simulation not only reduces the overall degrees of freedom in the system compared to the fully unstructured mesh but also enables feature-based mesh adaptation. This paper also explores the effects of subset distance and shock-based adaptation on the solution. Kestrel's drag coefficient values for the configurations with and without the nacelle compare very favorably to results from DPW VI and verify that Kestrel dual-mesh simulations produce accurate answers while minimizing user effort.