Quasi-Steady Simulations for the Efficient Generation of Static Aerodynamic Coefficients at Subsonic Velocity

Report No. ARL-TR-7790
Authors: Sidra I Silton
Date/Pages: September 2016; 54 pages
Abstract: A quasi-steady sweep procedure that allows determination of the static aerodynamic coefficients for a range of angles of attack in a single simulation is extended to subsonic Mach numbers. Given a steady-state solution, the procedure can be used to generate multiple numerical simulations over a select range of angles of attack for a given set of flight conditions using the time-accurate Reynolds-Averaged Navier–Stokes equations. Computational Fluid Dynamics simulations are completed for a canard-controlled, fin-stabilized projectile at Mach 0.65 for a moderate range of angles of attack using a quasi-steady sweep procedure. Separate steady-state solutions are also computed at various angles of attack for comparison. Comparison of the results showed that the quasi-steady sweep procedure can provide accurate static aerodynamic coefficients efficiently if convergence at each time step is ensured.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2016