Experimentální studie výbuchových charakteristik směsí oxidu uhelnatého a metanu se vzduchem

Abstract

This diploma thesis aims to experimentally evaluate the effect of the addition of carbon monoxide concentration on the explosion parameters of a mixture of methane and air. It also presents the results of an experiment and calculation of the explosion pressure in the volume range of 0–6 % of carbon monoxide in the mixture. The Warsaw University of Technology software performed the explosion pressure calculation. The experiments were carried out in a 20-L spherical test chamber. A 50 J permanent spark located in the geometric center of the chamber was used as the ignition source. All experiments were performed at initial atmospheric pressure, temperature between 25, 50 and 100 °C and relative air humidity between 50 and 75 %. One of the results of the study is the maximum explosion pressure (pmax), maximum rate of pressure rise ((dp/dt)max) and deflagration index (KG). These values were further analyzed, discussed and interpreted by mathematical modeling and previous studies. As a result, adding CO concentration below its lower explosion limit affects the deflagration process of the explosion event. The main outcome of the study is the introduction of light into the problem of differences in the values of previous published studies and the quantification of explosion parameters depending on different initial temperatures.