Spatial and temporal distribution of LPG dispersion concentration in small-scale space

Abstract

Spatial and temporal distribution of dangerous chemicals gas is critical for emergency management and emergency evacuation. Experiment and simulation are usually used to estimate gas leakage concentration. However, it takes time to obtain accurate results quickly. In order to study the dispersion of dangerous chemicals in transportation, based on the similarity theory, a small-scale experimental platform for heavy gas leakage of expressway was built, and the small-scale space experiment was carried out on the dispersion process of liquefied petroleum gas (LPG). Through qualitative and quantitative analysis of the experimental results, A model for continuous leakage dispersion of heavy gas under specific conditions and a fast calculation equation are constructed. The model and the fast calculation equation were validated through the large-scale test data from abroad. The validation results show that the error of mathematical model is small. The calculation equation can be used to estimate the concentration of heavy gas in hazardous chemical leakage accident quickly. In this paper, Data analysis model based on SPSS is developed to predict the gas concentration quickly. Database of heavy gas leakage dispersion is established. It can provide theoretical and data support for emergency management agency to delimit the dispersion range and warning area accurately and quickly. The research results are of great significance for enriching the law of heavy gas leakage dispersion and improving the rescue and disposal ability of emergency agencies.