IGNITION OF HYDROGEN–AIR–WATER VAPOR LEAN MIXTURES BEHIND SHOCK WAVES

The ignition of lean mixtures of hydrogen with air and water vapor behind refl ected shock waves was studied experimentally in the temperature range 947–1552 K at a pressure of 1 atm. Numerical simulation of the concentration profi les of the electron-excited OH* radical using several widely employed detailed kinetic mechanisms is performed. It is shown that the infl uence of water on the self-ignition of lean hydrogen–air mixtures at temperatures above 1050 K is insignifi cant. The discrepancy between the results of calculations and experimental data at temperatures below 1050 K is explained by the presence of small impurities formed in catalytic reactions on the surface.
The ignition of lean mixtures of hydrogen with air and water vapor behind refl ected shock waves was studied experimentally in the temperature range 947–1552 K at a pressure of 1 atm. Numerical simulation of the concentration profi les of the electron-excited OH* radical using several widely employed detailed kinetic mechanisms is performed. It is shown that the infl uence of water on the self-ignition of lean hydrogen–air mixtures at temperatures above 1050 K is insignifi cant. The discrepancy between the results of calculations and experimental data at temperatures below 1050 K is explained by the presence of small impurities formed in catalytic reactions on the surface.
Author:  P. N. Krivosheyev, Yu. S. Kisel, A. V. Skilond′, K. P. Avsyukevich,a,b A. M. Tereza, O. G. Penyazkov
Keywords:  ignition delay, shock tube, shock wave, mixture of hydrogen with air and water vapor, detailed kinetic mechanism, chemical kinetics, numerical simulation
Page:  137