Research on Transient High Temperature Testing Technology for Explosion of Thermostatic Explosives
In order to evaluate the thermal damage performance of thermal pressure explosives and address the issues of intense temperature changes,short duration,high measurement difficulty,and difficulty in measuring the temperature distribution of the fire-ball at the moment of explosion,a mixed testing method for contact and non-contact temperature measurement was proposed.The in-frared thermal imager and thermocouple temperature measurement system were built to test the explosion process of two thermal pressure explosives inside and outside the tunnel.Two infrared thermal imagers were used to shoot at high and low frame rates re-spectively,and tungsten rhenium thermocouples were placed at a certain distance from the explosion center.The information from dif-ferent dimensions of the fireball was obtained at different times and locations,completely recording the entire process of explosion temperature changes with the high frame rate and resolution,which studied the temperature changes during the temperature pressure explosion process in detail.Among them,the maximum temperature of the explosion inside the cave can reach by over 1 800 ℃,the maximum diameter of the fireball by about 8.3 m,the maximum temperature of the explosion outside the cave by over 1 700 ℃,and the maximum diameter of the fireball by about 7.7 m.The cave makes the maximum temperature of the fireball higher,with a dura-tion of 14 ms and temperature of over 1 800 ℃,and the thermal damage effect is stronger.Test results for the temperature and pres-sure bombs inside and outside the tunnel show that the maximum deviation of the highest temperature is 5.1％and 5.8％,respective-ly,with an average deviation of 5.45％,which is within a reasonable range and can meet the requirements of explosion field testing.
thermobaric explosivesinfrared thermal imagerthermocoupleheat damagetransient temperature
万方数据
维普
