Fundamental Physics and Model Assumptions in Turbulent Combustion Models for Aerospace Propulsion
Technical rept. Jun-Jul 2014
AIR FORCE RESEARCH LAB EDWARDS AFB CA
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The paper provides a fundamental overview of turbulence and turbulent combustion models for large eddy simulations of reacting flowfields. The focus is on examining model assumptions in the context of aerospace propulsion applications, which typically involve high-speed flows, high pressures, compressible phenomena such as shocks, ignition dynamics and acoustic instabilities. Models considered include the dynamic Smagorinsky model for turbulence, and laminar flamelets, transported-PDF and the linear eddy model LEM for turbulent combustion. Validation procedures are devised to determine modeling gaps and identify areas where model enhancements are needed.
- Combustion and Ignition