Duan Zhongdi, Ren Tao, Ding Guoliang
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China.
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China.
J Hazard Mater. 2019 Mar 5;365:375-385. doi: 10.1016/j.jhazmat.2018.11.025. Epub 2018 Nov 10.
The boiling liquid expanding vapor explosion (BLEVE) is a most severe hazard in liquefied gas storage and transportation, and its prevention depends on the suppression of the explosive boiling during tank depressurization. This paper proposes an idea of using micro-fin type surface to suppress the explosive boiling, and experimentally investigates the suppression mechanisms and quantitative effects on the explosive boiling. In the experiments, the bubble behaviors on a micro-fin and a smooth surface are observed for phenomenal analysis, and the explosive boiling consequences of the two surfaces are measured for quantitative evaluation. The results show that, the micro-fin surface brings forward the nucleation onset and reduces the boiling region, resulting in a weakened explosive boiling process. Among release pressures of 200 kPa-500 kPa and vent areas of 1.8 cm-5.3 cm, the adopted micro-fin surface reduces the boiling-induced pressure rise and the released energy by up to 24.5% and 35.6%, respectively.
沸腾液体扩展蒸汽爆炸（BLEVE）是液化气储存和运输中最严重的危险，其预防取决于抑制罐体减压过程中的爆炸沸腾。本文提出了利用微翅片型表面抑制爆炸沸腾的想法，并通过实验研究了抑制机理及其对爆炸沸腾的定量影响。在实验中，观察微翅片表面和平整表面上的气泡行为以进行现象分析，并测量两种表面的爆炸沸腾后果以进行定量评估。结果表明，微翅片表面使成核起始提前并减小了沸腾区域，从而削弱了爆炸沸腾过程。在200kPa至500kPa的释放压力和1.8平方厘米至5.3平方厘米的排气面积范围内，所采用的微翅片表面分别使沸腾引起的压力上升和释放能量降低了24.5%和35.6%。
