Key parameters of shock-induced combustion around the blunt body traveling at hypervelocities
Abstract
The shock-induced combustion with the periodic unsteadiness around the projectile fired into hypersonic flows is numerically studied in this report. The mechanism of the periodic unsteadiness is clarified using the x-t diagram of the flow variable on the stagnations streamline. The frequencies of the periodic unsteadiness obtained in the present study quantitatively agree with the experimental observations. Key parameters to determine the frequency of the periodic unsteadiness are discussed using the time-integration of the species equations. Induction time is a key parameter for the frequency of the unsteadiness. Concentration of heat release is important for the unsteadiness itself. Total energy creating the compression waves depends on the amount of heat release itself. All of these features are recognized in a simple zero-dimensional analysis.
- Publication:
-
Computational Fluid Dynamics 1992
- Pub Date:
- December 1992
- Bibcode:
- 1992cfd..proc...41M
- Keywords:
-
- Chemical Reactions;
- Combustible Flow;
- Computerized Simulation;
- Hypersonic Flow;
- Oscillating Flow;
- Tvd Schemes;
- Air;
- Combustion Stability;
- Density Distribution;
- Euler Equations Of Motion;
- Hydrogen;
- Mathematical Models;
- Numerical Flow Visualization;
- Pressure Distribution;
- Shock Waves;
- Temperature Effects;
- Fluid Mechanics and Heat Transfer