DETERMINATION OF IGNITION KINETIC PARAMETERS FOR DISPERSED CONDENSED SUBSTANCE AT LOCAL HEATING

The technique and results of pilot studies on determination of kinetic parameters of crushed wood (sawdust) ignition at interaction with the single steel particle heated to high temperatures in the form of a disk are presented in work. The analysis of calculated characteristics reliability is carried out with use of the formulated mathematical model of gas-phase ignition process for the dispersed condensed substance at local heating by a single “hot” particle. It is established that the experimental and calculated results of the ignition delay time rather low values of initial temperature of limited heat source content differ almost for 30 %. It is offered to consider possible dependence of a preexponential factor on temperature for increasing accuracy of numerical research results of dispersed wood ignition process by a local heating source. At the analysis of experimental and theoretical process integrated characteristics at variation of initial temperature local power source rather good compliance of ignition delay time is obtained.