Ignition, Combustion, Detonation, and Quenching of Reactive Mixtures.
Abstract
A burner tube having a rectangular cross-section with a width-to-length ratio of approximately 200 has been used for measuring the quenching distances of various fuel oxidizer mixtures by squeezing the flames between two movable plates. For laminar flames the quenching distances were found to be independent of the initial gas speed, the Reynolds number of the flow of unburned gas, and the geometry of the burner port. However, they depend on the material and structure of the quenching surface; the composition of the unburned gas, its thermal conductivity, diffusion coefficient, and specific heats; the adiabatic flame/temperature, and the linear rate of flame propagation. Spectrographic studies revealed that quenching greatly reduces the concentrations of active species in the flame and that the populations of the rotational levels of the CH radical correspond to temperatures which are much higher than the adiabatic flame temperature. A simple mathematical model has been used to develop a theoretical equation for the prediction of quenching distances of various fuel-oxidizer mixtures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1978
- Accession Number
- ADA062291
Entities
People
- Om P. Dhiman
- Rudolph Edse
Organizations
- Ohio State University