Numerical Simulation of Natural Gas Release and Risk Zone Forecast in Urban Areas

Risk zone forecast is of great importance in natural gas pipeline route choice, safe separation distances determination and disaster assistance. In this article, the risk zone after the natural gas release in urban areas was predicted under the condition of different wind directions or different release rates, with the method of computational fluid dynamics (CFD). In addition, the change tendency of the risk zone with the increase of release rate under the environment of strong winds and breeze was studied respectively.