摘要
基于Fluent模拟研究了泄漏口直径、波导窗位置和个数对医院磁共振成像(MRI)室氦气泄露扩散的影响。泄漏口直径增大,相同时间内氦气释放量和初始泄露射流距离均增大,区域内涡旋现象愈明显,气云扩散气云至地面时间缩短。距离泄露源越远,达到使人致命的氦气浓度所需时间越短,危险性越大。波导窗位置靠近泄露口时,氦气泄露在水平方向传播变缓,距离泄露口越远,达到使人危险的氦气浓度所需时间越长。有2个波导窗时,扩散过程形成的气云面积较小,人安全区域最大。研究结果可为MRI室氦气泄露事故预防、处置及设备管理提供参考。
Based on the Fluent, this paper studied the influence of the diameter of the leak hole, the position and number of the waveguide window on the diffusion of helium gas in the hospital MRI room. The results show that the diameter of the leakage opening increases, the helium release amount and the initial leakage jet distance both increase within the same time, the vortex phenomenon in the area becomes more obvious, and the time for the gas cloud to diffuse and reach the ground is shortened. The farther away from the source of the leak, the shorter the time required to reach the lethal helium concentration and the greater the risk. When the waveguide window is close to the leak port, the helium leak spreads slowly in the horizontal direction. The farther away from the leak port, the longer it takes to reach the dangerous helium concentration. When there are two waveguide windows, the area of the gas cloud formed during the diffusion process is small and the human safety area is the largest. The research results would provide references for MRI’s helium leakage accident prevention, treatment and equipment management.
作者
李席
嵇文静
欧阳翠
孙萧萧
周密
许晓光
LI Xi;JI Wen-jing;OU Yang-cui;SUN Xiao-xiao;ZHOU Mi;XU Xiao-guang(School of Materials and Chemical Engineering,Bengbu University,Bengbu 233030,China;School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Anhui Xiangyuan Technology Co.Ltd.,Bengbu 233030,China)
出处
《长春师范大学学报》
2022年第10期82-87,共6页
Journal of Changchun Normal University
基金
安徽省高等学校省级质量工程项目虚拟仿真实验教学项目“工业锅炉DCS控制和3D虚拟仿真实验”(2019xfxm79)
安徽省高等学校省级质量工程项目虚拟仿真实验教学项目“精馏3D及工业双塔精馏DSC控制虚拟仿真实验”(2018xfsyxm009)
蚌埠市科技创新指导类项目“含酚废水降解的非贵金属催化剂及其作用机理”(20210349)。
关键词
医院
MRI
氦气
泄露
模拟
hospital
MRI
helium
leakage
simulation
