On some numerical schemes for transonic flow problems

Mostrel, Marco Mosché

doi:10.1090/S0025-5718-1989-0955752-2

On some numerical schemes for transonic flow problems
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by Marco Mosché Mostrel PDF

Math. Comp. 52 (1989), 587-613 Request permission

Abstract:

New second-order accurate finite difference approximations for a class of nonlinear PDE’s of mixed type, which includes the 2D Low Frequency Transonic Small Disturbance equation (TSD) and the 2D Full Potential equation (FP), are presented. For the TSD equation, the scheme is implemented via a time splitting algorithm; the inclusion of flux limiters keeps the total variation nonincreasing and eliminates spurious oscillations near shocks. Global Linear Stability, Total Variation Diminishing and Entropy Stability results are proven. Numerical results for the flow over a thin airfoil are presented. Current techniques used to solve the TSD equation may easily be extended to second-order accuracy by this method. For the FP equation, the new scheme requires no subsonic/supersonic switching and no numerical flux biasing. Global Linear Stability for all values of the Mach number is proven.

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J. Comput. Phys.

XTRAN

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A Program for Solving the General-Frequency Unsteady Transonic Small Disturbance Equation