Dangerous gases widely exist in modern production and people’s daily life.Once they are used or maintained improperly,they are very easy to leak,leading to major accidents seriously endangering people’s health and a...Dangerous gases widely exist in modern production and people’s daily life.Once they are used or maintained improperly,they are very easy to leak,leading to major accidents seriously endangering people’s health and asset safety,such as fire,explosion,burns,poisoning,asphyxia,etc.In this paper,the data collected from CNKI was taken as the research object,and the relevant research in the field of leakage and diffusion of hazardous gases was analyzed through visual analysis by using the VOSviewer software,so as to provide reference for subsequent scholars.展开更多
Using κ-εturbulent equation and SIMPLE arithmetic, a multi-buildings space model was set up under realistic circumstances. The methane （CH4） leakage diffusions from 3 gas-transporting pipelines with different pres...Using κ-εturbulent equation and SIMPLE arithmetic, a multi-buildings space model was set up under realistic circumstances. The methane （CH4） leakage diffusions from 3 gas-transporting pipelines with different pressures under 3 different wind flow conditions in the space with multi-buildings were simulated and the simulation results were contrasted and analyzed. Simulation results indicate that the leakage diffusion of CH4 could be influenced by surrounding buildings, besides the effect of the wind flow. In addition, CH4 gassy columniation will be bended to be adsorbed by surrounding buildings forming a high concentration zone when the pipe pressure is rather low or the wind velocity is rather fast. It will greatly increase the fatalness to the ambience and surrounding buildings.展开更多
文摘Dangerous gases widely exist in modern production and people’s daily life.Once they are used or maintained improperly,they are very easy to leak,leading to major accidents seriously endangering people’s health and asset safety,such as fire,explosion,burns,poisoning,asphyxia,etc.In this paper,the data collected from CNKI was taken as the research object,and the relevant research in the field of leakage and diffusion of hazardous gases was analyzed through visual analysis by using the VOSviewer software,so as to provide reference for subsequent scholars.
文摘Using κ-εturbulent equation and SIMPLE arithmetic, a multi-buildings space model was set up under realistic circumstances. The methane （CH4） leakage diffusions from 3 gas-transporting pipelines with different pressures under 3 different wind flow conditions in the space with multi-buildings were simulated and the simulation results were contrasted and analyzed. Simulation results indicate that the leakage diffusion of CH4 could be influenced by surrounding buildings, besides the effect of the wind flow. In addition, CH4 gassy columniation will be bended to be adsorbed by surrounding buildings forming a high concentration zone when the pipe pressure is rather low or the wind velocity is rather fast. It will greatly increase the fatalness to the ambience and surrounding buildings.
