Accession Number : ADA207581

Title :   Numerical Simulation of a Turbulent Flow through a Shock Wave.

Descriptive Note : Final technical rept. 1 Feb 87-31 Jan 89,

Corporate Author : NIELSEN ENGINEERING AND RESEARCH INC MOUNTAIN VIEW CA

Personal Author(s) : Nixon, David ; Kuhn, Gary D ; Farshchi, Mohammad

PDF Url : ADA207581

Report Date : 21 Apr 1989

Pagination or Media Count : 94

Abstract : This report describes the results of research into the interactions between shock waves and turbulent flows using numerical simulations. The research was conducted at transonic speeds with a normal shock wave and two dimensional turbulence, making use of existing knowledge and computational methods for developing insight to the shock/turbulence interaction. The results indicate that the shock has a significant effect on the turbulence. The shock produces a jump in the turbulence statistics, with a long relaxation distance to return to unshocked values. The turbulence kinetic energy is increased by as much as 30 percent by the shock. The density-velocity correlation becomes important during the shock jump and is greatly increased over the case without a shock. On the other hand, the pressure-velocity correlation is not so important. The shock speed and ripple were found to be important factors in determining the turbulence downstream of a shock wave. Shock speed and ripple correlations are the same size as other important turbulence correlations. The work must be extended to higher Mach numbers and three-dimensional turbulence, with oblique shocks and shear flows. The shock ripple may be more important for oblique shocks because of the larger v component. (jhd)

Descriptors :   *INTERACTIONS, *NUMERICAL ANALYSIS, *SHOCK WAVES, *TRANSONIC FLOW, *TURBULENT FLOW, CORRELATION, KINETIC ENERGY, LONG RANGE(DISTANCE), MACH NUMBER, MATHEMATICAL MODELS, NUMERICAL METHODS AND PROCEDURES, RELAXATION, RIPPLES, SHEAR PROPERTIES, SHOCK, STATISTICS, THREE DIMENSIONAL, TURBULENCE, TWO DIMENSIONAL, VELOCITY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE