Experimental and numerical analysis on propane gas explosion in narrow and long channel
In order to explore the anti-explosion impact characteristics of narrow and long channels such as sewage system in petrochemical enterprises,the experimental and numerical research on the impact characteristics of propane gas leakage and explosion pressure,venting flame size and so on in the channel were conducted by using a full-scale model of 10 m×1.5 m×1.5 m(length×width×height).The results show that in the channel with large length-diameter ratio of L/D =6,the gas ex-plosion overpressure presents a multi-peak shape,in which the P2 peak dominates the overpressure fluctuation.The maximum overpressure in the full-opening venting chamber at the tail end reaches 97 kPa,which is higher than those reported in the lit-erature with L/D in the range of 1～5.The impact characteristics such as explosion overpressure peak and venting flame size in the channel are affected by the factors such as venting outlet area and fuel volume concentration(referred to as concentra-tion,the same below).The overpressure peak decreases exponentially with the increase of venting outlet opening,and changes in a parabolic trend with the increase of initial fuel ratio concentration.The maximum length of venting flame is higher than the calculation results of NFPA 68 standard.The results of numerical model constructed in this paper are in good agreement with the experimental results.The research results can provide some reference for the consequence assessment and fire protec-tion design of oil and gas explosion in the narrow and long channels of related petrochemical enterprises.
narrow and long channelpropane gasoverpressure peakventing flame
NETL
NSTL
万方数据
