The two-phase flow evolution, internal pressure, and thermodynamics responses during a BLEVE (boiling liquid expanding vapor explosion) process with water are assessed. Various initial pressures ranging from 1.7 to 5.7 barg, liquid fills load and different pressure relief ways were tested. Results show that after the pneumatic valve was opened, the rise velocity of the bubble increased first, and then decreased until the rupture or collision of the bubbles. The countercurrent flow reversed to the mainstream was experimentally observed and inhibited the expansion flow to reduce the boiling intensity. Thus, as the initial pressure increased, the average rate of pressure rose first increased, then slightly decreased due to the competitive effects of expansion flow and countercurrent flow. The interactions between the rarefaction wave driven by a sudden opening of a valve and the medium degree of superheat, control the pressure response, and the delay of boiling can be classified into the rarefaction wave control region (dp/dt < 0) and the superheat degree control regime (dp/dt > 0). And the effect of the liquid fill level on the rate of pressure rise was not affected by the countercurrent flow. The boiling explosion after the crack formed was intensified with pressure relief action caused by a separate piece of equipment, due to the enhanced heterogeneous boiling on the inner wall.

评估了水在BLEVE（沸腾液体膨胀蒸气爆炸）过程中的两相流动演变，内部压力和热力学响应。测试了从1.7至5.7 barg的各种初始压力，液体填充载荷和不同的泄压方式。结果表明，打开气动阀后，气泡的上升速度先增大，然后减小，直到气泡破裂或碰撞。实验观察到逆流向主流，并抑制了膨胀流以降低沸腾强度。因此，随着初始压力的增加，由于膨胀流和逆流的竞争效应，平均压力上升率先上升，然后略有下降。dp / dt <0）和过热度控制机制（dp / dt > 0）。而且，液位对压力上升速率的影响不受逆流影响。由于内壁上异质沸腾的增强，形成裂纹后的沸腾爆炸会由于另一套设备的泄压而加剧。