Overpressure Test and Analysis of TNT Blast in Confined Chamber

In order to research the overpressure characteristic of shock wave in confined chamber,TNT was used as typical explosive to do air explosion test in a confined chamber. Though the tested overpressure curve in the chamber. The effect of charge mass,sensor's position and oxygen content on the shock wave and quasi-static were analyzed and put forward the concept of time of the formation of quasi-static overpressure. The result shows that,as the charge mass increasing,both shock wave overpressure and quasi-static pressure increased,while,the time of the formation of quasi-static overpressure decreased. Although,The sensor in channel can't show peak overpressure,it can test quasi-static pressure accurately. As the oxygen content increasing,quasi-static pressure increase.The result implied that detonation products combusted after detonation and increase oxygen content can increase reaction efficiency