Experimental study on performances of pressure venting devices under internal gas deflagration condition
A number of vented gas explosion tests were conducted in a self-designed explosion experimental facility filled with ethylene-air mixtures to study the performance of three types of pressure venting devices, i.e.light fragile calcium silicate board, hinged light sheet steel and polyethylene film.Ethylene concentrations in the mixed gas varied between 3 and 10 vol.%.The reduced explosion overpressure in chamber were analyzed, and external explosions were filmed by using high speed video.The test results show that the self-designed experimental facility could generate gas deflagration load to the larger-scale structures.To room enclosure with inertial venting devices such as calcium silicate board and hinged light sheet steel, the internal overpressure couldnt decrease immediately when internal overpressure reached the static activation overpressure.The movement of inertial venting devices should be considered in vent design.The peak value of dynamic activation pressure for calcium silicate board decrease with the increase of the internal pressure rise time.Dynamic activation pressure should be used as vent index of such devices.Internal gas deflagration pressure could be reduced by venting for its longer rise time.The lower the activation pressure of vent devices, the better the explosion venting effect.
Pressure venting device Vented gas explosion Dynamic activation pressure Reduced explosion pressure Deflagration
Kang-hua GAO Zhong QIU Song SUN
State Key Laboratory for Explosion & Impact and Disaster Prevention & Mitigation,Army Engineering Un Unit 91458ofPLA, China State Key Laboratory for Explosion & Impact and Disaster Prevention & Mitigation,Army Engineering Un
国际会议
2018 International Conference on Defence Technology (2018国际防务技术会议)
北京
英文
681-687
2018-10-21（万方平台首次上网日期，不代表论文的发表时间）