Accession Number:

ADA571739

Title:

Accuracy Analysis of DSMC Chemistry Models Applied to a Normal Shock Wave

Descriptive Note:

Technical paper

Corporate Author:

AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIR

Report Date:

2012-06-20

Pagination or Media Count:

9.0

Abstract:

A preliminary validation study of three DSMC chemistry models, two recent and one standard, is presented. First the 2D geometry and numerical approach used to simulate the shock experiments is verified. Next, 2 different vibrational relaxation models are validated by comparison with data for the M9.3 case where dissociation is small in the nonequilibrium region of the shock. Finally, the 3 DSMC chemistry model results are compared for the M13.4 case where nonequilbrium dissociation in the region where the vibrational temperature is greatly different for the rotational and translational temperature is important. It is shown that the peak vibrational temperature is very sensitive to vibrational favoring in the chemistry model and that the vibrationally-favored KSS model predicts the measured peak quite well.

Subject Categories:

  • Statistics and Probability
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE