Ignition-delay times in laser initiated combustion
- 1 July 1981
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 20 (13) , 2239-2242
- https://doi.org/10.1364/ao.20.002239
Abstract
A single pulse from a TEA CO2 laser is used to heat 1:7:14 mixtures of SF6:CH4:O2 to temperatures near 1000 K. A short- or long-duration pulse (one-half the energy deposited in 0.25 or 0.82 μsec, respectively) from a second TEA CO2 laser is used to ignite the mixture. At comparable values of absorbed energy from the second laser, ignition-delay times for the long-duration secondary pulse are approximately twice those for the short-duration pulse. Ignition of the hot mixture requires about 10% less absorbed energy with the short-duration pulse than with the long-duration pulse. These results indicate the short-duration pulse is more effective in producing a high population density of reactive species that initiate the reactions necessary for ignition.Keywords
This publication has 1 reference indexed in Scilit:
- Laser initiated combustion of CH4 + O2 mixturesOptics Communications, 1980