Determination of detonable gas mixture heat fluxes at thermal deburring

Abstract

Modern technology requires a multitude of precise parts that are a necessity in reliable methods of surface finishing. Energy of detonable gas mixture combustion has been used in manufacturing as a processing source for a long time. One of the most underappreciated methods is thermal deburring; this is caused by certain difficulties in modelling and simulation of this process due to a complex and poorly predictable nature of the combustion. A theoretical approach towards thermal deburring process using the conception of an equivalent chamber is described. Processing of combined experimental and computational data results in a simplified model of thermal deburring in the case with deflagration and combustion with a shock waves formation. The proposed mathematical model was verified by an experimental investigation of the combustion in a shock tube, the difference of compared parameters did not exceed 3%. The heat fluxes at thermal deburring by combustible gas mixtures and their distribution on part surfaces according to the direction of the shock waves propagation were calculated. A relation between the value of the heat flux and shock waves propagation was found with a convincing repeating trend.