基于CFD试验的危险介质泄漏数值模拟分析

CFD-based Numerical Simulation Analysis of Hazardous Material Leakage

鉴于危险介质一旦发生瞬时泄漏并发生继发性火灾或爆炸,将会造成更大的灾难,因此采用模拟软件研究危险介质泄漏后的扩散特性具有十分重要的意义。以氟里昂F-11瞬时泄漏后的物理过程为例进行模拟试验,并验证此法可行。再以此数学模型对液氯、液氨和液化石油气进行模拟试验,得到这三者瞬时泄漏后的扩散特性,试验结果表明液氯的扩散速度和云团半径最大,远远高于其他介质。这说明液氯一旦发生泄漏事故,后果最为严重,故在生产应用中需要提供足够的安全措施。

Given that hazardous materials may cause major catastrophe in the event of transient leakage with ensuing fire or explosion, it is essential to study the proliferation property of hazardous materials after leakage using simulation software. The method is proven to be practical through the simulation test of the physical process after the transient leakage of Freon F-11. Simulation test is conducted for liquid chlorine, liquid ammonia and liquefied petroleum gas using mathematical model to obtain the proliferation property of these three substances after transient leakage. The test findings indicate that liquid chlorine has the biggest proliferation rate and cloud diameter, which are far bigger than other substances. The test result shows that in the event of leakage, liquid chlorine has the most severe consequences, hence during production application, sufficient safety measures should be provided.