To investigate the feasibility of finite element simulation for predicting the heat transfer behavior of D powder fire extinguishing media,the experimental and numerical simulation methods were adopted.With the heat absorption rate,temperature rise rate and heat absorption rate as the characterization indexes,the experimental and simulation results under different heating methods,three kinds of thermal physical parameters and different particle size conditions were investigated.The results show that under the conditions of different heating methods,different thermal parameters and different particle sizes,the variation trend of the simulation results and the experimental results are in good agreement,which can accurately reflect the advantages and advantages of different fire extinguishing components in specific performance,size and extreme value relationship;The error between simulation results and experimental results under two heating methods is less than 10.33％,the error between simulation results and experimental results under different thermophysical parameters is less than 12.51％,and the error between simulation results and experimental results under different particle size conditions is less than 5.57％;The finite element simulation can provide a quick method for selecting components and evaluating properties of D dry powder fire extinguishing media.
关键词
D类干粉灭火剂/传热/热物性参数/数值模拟
Key words
D powder fire extinguishing media/heat transfer/thermal physical parameters/numerical simulation
维普
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