Calculation And Analysis Of Explosion Force Of Gas Leakage Accident In Indoor Kitchen

Based on the foundamental conditions of explosion and flammable gas explosion mechanism,this paper analyzes the propagation law of indoor gas leakage diffusion of residents,after the accident caused by leakage and fire explosion wave development after the impact of the explosion force,calculate the numerical and post accident danger zone radius,summarizes the influence of explosive force the important factors and related mechanism,analyzes the indoor residents combustible gas leakage and explosion hazard,the residents of indoor gas caused by burning explosion accident prevention mechanism.Study the main factors leading to the kitchen gas leakage and diffusion,summarize the leaking flow calculation of annular leakage;according to the usual vapor cloud explosion model to calculate the gas cloud explosion energy released by three nitro toluene equivalent method,and on this basis to determine the shock wave pressure formula and danger zone radius,it is found that the shock wave with the extension of time,the overpressure leakage increases,decreases with increasing distance from cloud center;gas explosion in the theoretical model,the temperature model is more convenient,the most simple,and change in response to the explosion pressure.When the explosion occurred in the sealed container,the gas pressure increased with the explosion,after reaching the peak pressure due to reactant consumption began to decline;the pressure of gas explosion in free space with the explosion of the first increases and then decreases,finally tends to a fixed value.Based on the three nitro toluene equivalent method,a formula for calculating explosion energy,explosion shock pressure and dangerous area of indoor natural gas rubber hoses is established,which can be used for quantitative calculation of gas leakage and explosion in urban household kitchens.According to the kitchen gas rubber hose shot flow simulation results,calculate the leakage caused by explosion pressure and leakage time,leakage flow injection is proportional,and the ignition distance is inversely proportional to.Considering the size of the common family kitchen,two kinds of gas leakage conditions are considered respectively,the three nitro toluene equivalent method is applied to calculate and the commercial software is used for numerical simulation.According to the studies on gas leakage diffusing rules and the destruction effect of explosion accidents,multiple preventive measures were brought up from the aspects of ignition sources,flammable vapor cloud formation conditions,gas facilities and safety awareness of the residents.It was pointed out that structure with great node ductility and integrity was suitable for the building.For instance,shear walls,the cast-in-place reinforced concrete frames,simplified structures and steel frame structures.And the formula for calculating the venting area of the buildings was introduced correspondingly.