Computation of viscous transonic flows about aircrafts and its visulization.

Viscous Computation of Steady/Unsteady Transonic Diffuser Flows

The lag model proposed by Olsen and Coakley (2001) is applied to simulate the steady and unsteady transonic flows in a diffuser. The unsteady flows are induced by imposing fluctuating back-pressures. A fully implicit time–accurate multigrid algorithm is used for solving the Navier-Stokes equations and the coupled k-ω turbulence model equations. Two test cases are investigated, one with a weak s...

Parallel Computation of Viscous Flows

In this study we describe parallel iterative and direct solution strategies for viscous flow computation using domain decomposition. Both stream function vorticity and primitive variable formulations are considered. The basic ideas associated with the element-by-element approach and subdomain approach can also be extended to other cell or control-volume approximate formulations. Numerical resul...

Application of viscous-inviscid interaction methods to transonic turbulent flows

Numerical Computation of Transonic Flows with Shock Waves∗

Some recent developments in numerical methods for calcuting solutions to the transonic potential flow equation are reviewed, including (1) the construction of stable coordinate independent difference schemes; (2) the use of conservatiation form to insure proper shock jump conditions; (3) analysis of the relaxation method by the time dependent analogy; (4) accelerated iterative schemes.

Adaptation of Structured Grid for Supersonic and Transonic Flows

Two distinct redistribution grids - adaptation techniques, spring analogy and elliptic grid generator are applied to two-dimensional steady, inviscid, shocked flows, and the ability of each technique is examined and compared. Euler equations are solved base on Roe's Reimann solver approach to simulate supersonic flow around a sphere, transonic flow about an airfoil and supersonic flow in a symm...