液化四氟乙烷小孔泄漏试验研究

发布时间：2018-05-03 03:07

本文选题：安全工程 + 四氟乙烷　；参考：《安全与环境学报》2015年02期

【摘要】：采用高速摄影技术,考察了液化四氟乙烷发生小孔泄漏时,其水平泄漏和垂直泄漏的初始云团演化行为、泄漏的质量流率、喷射速度和喷射角,并与理论计算公式进行了对比。结果表明:水平喷射两相云团尾部出现涡流,涡流大幅加快了云团向空气中扩散的速率;垂直喷射的两相云团在地面形成液池,液池大幅增加了液化气体向空气中蒸发的速率。水平泄漏试验的喷射角与容器内超压变化规律相似,泄放初期喷射角逐渐增大,经历一段平坦期,到泄放末期喷射角减小。水平泄漏和垂直泄漏的初始喷射速度分别为25 m/s和20 m/s,与理论值26.6 m/s基本吻合。水平泄漏的质量流率的试验值和理论值分别为0.0598 kg/s和0.0684 kg/s,垂直泄漏的分别为0.0472 kg/s和0.059 6 kg/s,结果对比基本吻合,推荐的泄漏质量流率和小孔喷射速度公式可以用于液化四氟乙烷小孔泄漏。
[Abstract]:The initial cloud evolution behavior, mass flow rate, jet velocity and jet angle of horizontal and vertical leakage of liquefied tetrafluoroethane were investigated by means of high speed photography, and compared with the theoretical calculation formula. The results show that the eddy current appears in the tail of the horizontal jet two-phase cloud cluster, which greatly speeds up the diffusion rate of the cloud cluster into the air, and the vertical jet two-phase cloud cluster forms a liquid pool on the ground, which greatly increases the evaporation rate of the liquefied gas into the air. The injection angle of the horizontal leakage test is similar to that of the overpressure in the vessel, and the jet angle increases gradually at the initial stage of release, and then decreases at the end of the discharge period after a flattening period. The initial injection velocities of horizontal leakage and vertical leakage are 25 m / s and 20 m / s respectively, which are in good agreement with the theoretical value of 26.6 m / s. The experimental and theoretical values of the mass flow rate of horizontal leakage are 0.0598 kg/s and 0.0684 kg / s, respectively, and the vertical leakage are 0.0472 kg/s and 0.059 6 kg / s, respectively. The recommended leakage mass flow rate and pore injection velocity formula can be used for liquefied tetrafluoroethane pore leakage.
【作者单位】：天津大学化工学院;
【分类号】：TQ086.5

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