Monte Carlo simulation of a near-continuum shock-shock interaction problemA complex shock interaction is calculated with direct simulation Monte Carlo (DSMC). The calculation is performed for the near-continuum flow produced when an incident shock impinges on the bow shock of a 0.1 in. radius cowl lip for freestream conditions of approximately Mach 15 and 35 km altitude. Solutions are presented both for a full finite-rate chemistry calculation and for a case with chemical reactions suppressed. In each case, both the undisturbed flow about the cowl lip and the full shock interaction flowfields are calculated. Good agreement has been obtained between the no-chemistry simulation of the undisturbed flow and a perfect gas solution obtained with the viscous shock-layer method. Large differences in calculated surface properties when different chemical models are used demonstrate the necessity of adequately representing the chemistry when making surface property predictions. Preliminary grid refinement studies make it possible to estimate the accuracy of the solutions.
Document ID
19920065221
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Carlson, Ann B. (NASA Langley Research Center Hampton, VA, United States)
Wilmoth, Richard G. (NASA Langley Research Center Hampton, VA, United States)