Activation of Chain Processes in Combustible Mixtures by Laser Excitation of Molecular Vibrations of Reactants

摘要

The combustion kinetics of H_2-air mixtures containing small amounts(<1%)of ozone is analyzed for the case of excitation of asymmetric vibrations of O_3 molecules by CO_2 laser radiation with a wavelength of approx=9.7 mum.It is shown that the irradiation leads to acceleration of the collisional dissociation of O_3 molecules,activation of the chain ignition mechanism,and a decrease in the induction period and ignition temperature.The excitation of asymmetric vibrations of O_3 molecules by the CO_2 laser radiation is 10-10~3 times more effective than the currently used method of combustion initiation based on local heating of a medium by IR radiation.