Computation of nonstationary strong shock diffraction by curved surfacesA two-dimensional, high resolution shock-capturing algorithm was used on a supercomputer to solve Eulerian gasdynamic equations in order to simulate nonstationary strong shock diffraction by a circular arc model in a shock tube. The hypersonic Mach shock wave was assumed to arrive at a high angle of incidence, and attention was given to the effect of varying values of the ratio of specific heats on the shock diffraction process. Details of the conservation equations of the numerical algorithm, written in curvilinear coordinates, are provided, and model output is illustrated with the results generated for a Mach shock encountering a 15 deg circular arc. The sample graphics include isopycnics, a shock surface density profile, and pressure and Mach number contours.
Document ID
19870025335
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yang, J. Y. (NASA Ames Research Center Moffett Field, CA, United States)
Lombard, C. K. (PEDA Corp. Palo Alto, CA, United States)
Bershader, D. (Stanford University CA, United States)