Forecast of Contaminated Range about Leakage of Liquid Propellant N_2O_4

摘要

In order to provide referenced basis for security analysis, risk control and emergency measures of hazardous N_2O_4 accidents, With the consideration of the special physical and chemical properties of N2O4, a series of reasonable hypothesizes and reduced conditions were presented and models of leakage, evaporation and dispersion were investigated. According to these models and the assumed conditions, the processes of leakage, evaporation and dispersion were simulated. The corresponding reduced mathematical equations were obtained. It can be concluded that under specific conditions, the quantity of leakage liquid and gaseous N_2O_4 is mostly influenced by the area of leakage hole, the evaporation rate of leakage N_2O_4 was mostly influenced by the radius of liquid pool, temperature difference and evaporation time, and the gas concentration at a random leeward point is mostly influenced by the wind speed and the distance to the dispersion source.