Study of Obstruction Rate in Confined Spaces on the Behavior and Overpressure Characteristics of LPG Deflagration Flame

Experiments were conducted with a self-designed small-scale oil and gas explosion device and studied the effect of flat-type obstacles with different obstruction rates on LPG deflagration behavior and overpressure characteristics and deflagration pressure relief phenomenon in a narrow space. The results showed that the appearance of peak breaking pressure was largely independent of the arrangement of the barrier. Throughout the explosion process, the pressure at the ignition port gradually increases as the obstruction rate decreases, while the pressure at the vent decreases as the obstruction rate decreases. The peak of the negative pressure generated during the explosion similarly decreases as the obstruction rate decreases. And the arrangement with a reduced obstruction rate has a suppressive effect on flame propagation, while the arrangement with an increased obstruction rate will have an accelerating effect on flame propagation.