Projectile Base Flow Analysis
Abstract
The primary purpose of this research project has been to analyze, through detailed plots and analysis, results obtained in ARO Contract DAAD19-99-C-0047. We have also determined model-predicted effects of base bleed on projectile base flows. In clarifying the impact of model revisions made to the Wilcox Stress- model in Contract DAAD19-99-C-004, we have revised and improved surface boundary conditions for both the Stress- and k- models. Detailed mean-flow and turbulence-property profile plots show that the k- model predictions are closer to measurements than those of the Stress- model and those of computations done by other researchers using the k- model. A grid resolution study confirms that the numerical results obtained in our computations are accurate. Numerical experiments seeking improvements in predicted results using the Stress- model failed to achieve any significant improvement. Attempts to improve k- model predictions with a nonlinear stress/Strain-rate constitutive relation also proved ineffective. Predictions for effects of base bleed are consistent with measurements and are similar to those obtained in other research studies.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 2003
- Accession Number
- ADA414763
Entities
People
- David C. Wilcox