Theories of Turbulent Combustion in High Speed Flows
Abstract
Since Damkohler and Reynolds numbers over the range of conditions relevant to supersonic hydrogen-air combustion were found to be consistent with the combustion occurring in the reaction-sheet regime, detailed numerical integrations were performed on the structures of counterflow hydrogen-air diffusion flames, for pressures from 0.5 to 10 atm and air temperatures from 300 K to 1200 K, at a hydrogen temperature of 300 K. The results showed extinction to occur at high enough rates of strain in most cases, but no extinction for air temperatures above about 1000 K. Reduced chemical-kinetic mechanisms were developed for simplifying the computations. The computed extinction strain rates were found to be in excellent agreement with experiments. Compressibility effects were taken into account, and the results are being worked into methods for describing turbulent combustion in high-speed flows.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 20, 1992
- Accession Number
- ADA253032
Entities
People
- F. A. Williams
- P. A. Libby
Organizations
- University of California, San Diego