Springer Online Journal Archives 1860-2000
Energy, Environment Protection, Nuclear Power Engineering
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Abstract We present the results from an experimental study into the dynamics involved in the formation and the unique features of ignition in shock gas suspensions of coal dust with a dispersion of〈40 μm and a volatile content of 9, 26, and 55%. We have determined the ignition delays τig for coal dusts in air and in pure oxygen for a range of Mach numbers from 2.6 to 4.0 in an incident shock wave. We have established that the quantity τig as well as the nature of the function τig(1/T) are significantly affected by the kinetics of the volatile yield, in addition to the kinetics of volatile ignition. We have derived an approximation expression for τig as a function of the content of volatiles, the temperature of the medium, and the partial pressure of the oxygen.
Type of Medium: