RESEARCH OF HEAT STREAM REGISTRATION PARAMETERS DURING BURNING AND DETONATION IN THE CHANNEL OF GAS MIXTURE
Experimental method of research of heat stream on the channel walls with thermocouple sensors during burning and detonation of gas mixture in it is presented. The heat and electromagnetic processes happening in planar thermocouples at their impulse heating with the reaction products of gas mixtures are reviewed in details. The experimental data obtained by such thermocouples in the detonation process of 2O2+N2+CH4 mixture in 70 mm metal pipe with the initial pressure 0,2; 0,4 atm, and also during fast spread of burning in the 1800 mm diameter pipe in methane-air mixture at atmospheric pressure with volumetric methane concentration about 9,3 – 9,8% are presented. Numerical calculations of heat streams from reacting gas mixture on the channel walls are done. Thermal batteries consisting of such planar thermocouples can be used as combustion and explosion sensors in the mines dangerous for gas and dust. Characteristic time of electric impulse formation by thermal battery is about 1 ms, which allows to use it as the start signal to initiate the system of fire-explosion extinguishing which usually take 100 ms to start working.