CFD Numerical Simulation on Three Dimensions Diffusion Concentratio n Field of Indoor Gas Leakage

摘要

In developing use of natural gas at the same time, due to the natural gas easier to disclosure, flammable, explosive, and so on. What happened at home and abroad by the gas leakage and it becomes a major accidents caused by the death, personal injury and property damage by the year 2001. On the Interior, as a result of the impact of the gas leak counterenasures gave rise to the attention of the parties; therefore, will seriously study the indoor natural gas leakage effect on indoor critical. This article is based on the reference again CFD in numerical simulation models. Simulation results indicate that: the density of the gas is less than the air density gas leak in the vertical direction after the diffusion rate is greater than the horizontal direction of diffusion rate. And, on a different level, the volume of a gas leak has a score distribution springs'hysteresis period, its height, the longer the period of stagnation. At the same time, in the course of, the leakage of gas leakage reached explos ion limits of volume fraction distribution area a guaranteed level of the zone.