Accession Number:

ADA610861

Title:

Fundamental Physics and Model Assumptions in Turbulent Combustion Models for Aerospace Propulsion

Descriptive Note:

Technical rept. Jun-Jul 2014

Corporate Author:

AIR FORCE RESEARCH LAB EDWARDS AFB CA

Report Date:

2014-06-01

Pagination or Media Count:

35.0

Abstract:

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.

Subject Categories:

  • Combustion and Ignition
  • Astronautics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE