化工学报2024，Vol.75Issue(5)：2072-2080,9.DOI:10.11949/0438-1157.20231387
气流输运工况玉米淀粉爆炸火焰传播与压力特性实验研究
Experimental study on flame propagation and pressure characteristics of corn starch explosion under airflow transport conditions
摘要
Abstract
A self-built 2 m long air flow transport pipeline test device was used to carry out corn starch explosion experiments under different air flow velocities.Flame propagation behavior and pressure parameters were acquired through high-speed photography and pressure sensors.The experimental findings were employed to examine the influence of airflow velocity on the flame propagation behavior and explosion characteristics of cornstarch under various pneumatic transport conditions.The results indicate that,as airflow velocity increases,there is an initial increase followed by a subsequent decrease in the luminosity of the dust explosion flame,flame propagation speed,and maximum explosion pressure.An intriguing observation is the spiral-like propagation of flames towards the terminus of the pipeline.When the airflow velocity increased from 5 m/s to 10 m/s,the maximum flame propagation speed increased from 74.07 m/s to 89.51 m/s,and the maximum explosion pressure rose from 17.08 kPa to 23.42 kPa.When the air flow speed is increased to 15 m/s,the maximum flame propagation speed and explosion pressure decrease.The most significant effects were observed at a mass concentration of 300 g/m3,where the explosion pressure decreased by 41%,500 g/m3 was the least affected and the explosion pressure is reduced by 7.4%.关键词
气流输运/粉尘爆炸/气流速度/火焰传播/火焰传播速度/爆炸压力Key words
air transport/dust explosion/airflow velocity/flame propagation/flame propagation velocity/explosion pressure分类
资源环境引用本文复制引用
张帅,喻健良,丁建飞,闫兴清..气流输运工况玉米淀粉爆炸火焰传播与压力特性实验研究[J].化工学报,2024,75(5):2072-2080,9.基金项目
国家自然科学基金项目(52174167) （52174167）
