NTRS - NASA Technical Reports Server
computation of steady and unsteady compressible quasi-axisymmetric vortex flow and breakdownThe unsteady, compressible Navier-Stokes equations are used to compute and analyze compressible quasi-axisymmetric isolated vortices. The Navier-Stokes equations are solved using an implicit, upwind, flux-difference splitting finite-volume scheme. The developed three-dimensional solver has been verified by comparing its solution profiles with those of a slender, quasi-axisymmetric vortex solver for a subsonic, isolated quasi-axisymmetric vortex in an unbounded domain. The Navier-Stokes solver is then used to solve for a supersonic quasi-axisymmetric vortex flow in a configured circular duct. Steady and unsteady vortex-shock interactions and breakdown have been captured. The problem has also been calculated using the Euler solver of the same code and the results are compared with those of the Navier-Stokes solver. The effect of the initial swirl has been tentatively studied.
Kandil, Osama A. (Old Dominion Univ. Norfolk, VA, United States) Kandil, Hamdy A. (Old Dominion University Norfolk, VA, United States) Liu, C. H. (NASA Langley Research Center Hampton, VA, United States)
August 15, 2013
January 1, 1991