摘要
针对高压七氟丙烷气体喷放行为,建立了密闭腔室高压气体小孔喷射动态发展与演化模型,基于数值分析研究了高压七氟丙烷小孔喷射过程中的组分场、温度场和速度场等特性,并开展了相应喷放试验研究。计算结果表明,七氟丙烷喷射后易形成气体回卷,继而在障碍物靠近喷射口一侧形成七氟丙烷稀薄区域。七氟丙烷发生意外喷射时,尽管在喷口附近产生的最低温度低至-20℃,当七氟丙烷喷射口距离电子设备超过1.75 m时,则相应的低温影响往往在可接受范围。
The injection of high-pressure fluoropropanegas in a small hole of an enclosed chamber was modeled to investigate their detail behaviors, which was compared with the corresponding experimental measurements. Based on the numerical simulations, the concentration, temperature and velocity during the injection of high-pressure fluoropropane were analyzed. The simulated results indicated that a flowback of the fluoropropane gas was shown near an obstacle, which resulted in the low concentration at the other side of the obstacle. The experimental measurements showed that the lowest temperature at the nozzle was as cold as-20 ℃ during the accidental leakage of high-pressure fluoropropane. However, the temperature decrease near the electrical equipment is acceptable if they are more than 1.75 m away from the leakage orifice.
作者
袁焱华
卢启钊
谢启源
Yuan Yanhua;Lu Qizhao;Xie Qiyuan(Shanghai Fire Science and Technology Research Institute of MEM,Shanghai 200032,China;State Key Lab of Fire Science,University of Science and Technology of China,Anhui Hefei 230027,China)
出处
《消防科学与技术》
CAS
北大核心
2022年第10期1440-1444,共5页
Fire Science and Technology
基金
应急管理部上海消防研究所科技计划项目(20SX28)。
关键词
消防
七氟丙烷
高压喷射
低温损伤
机房
电子设备
数值模拟
fire safety
fluoropropane
high-pressure injection
cooling damage
computer room
electrical equipment
numerical simulation
