A set of strongly coupled, upwind algorithms for computing flows in chemical nonequilibriumTwo new algorithms have been developed to predict the flow of viscous, hypersonic, chemically reacting gases over three-dimensional bodies. Both take advantage of the benefits of upwind differencing, Total Variation Diminishing (TVD) techniques and of a finite-volume framework, but obtain their solution in two separate manners. The first algorithym is a time-marching scheme, and is generally used to obtain solutions in the subsonic portions of the flow field. The second algorithm is a much less expensive, space-marching scheme and can be used for the computation of the larger, supersonic portion of the flow field. Both codes compute their interface fluxes with a new temporal Riemann solver and the resulting schemes are made fully implicit including the chemical source terms.
Document ID
19890037803
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Molvik, Gregory A. (NASA Ames Research Center Moffett Field, CA, United States)
Merkle, Charles L. (Pennsylvania State University University Park, United States)