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

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Technical Report,01 Dec 2014,01 Apr 2015

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US Army Research Laboratory Aberdeen Proving Ground United States

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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 NavierStokes 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.

Subject Categories:

  • Military Aircraft Operations
  • Fluid Mechanics

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