TiH2粉尘火焰传播速度及温度分布的高速二维测量  

High-Speed Two-Dimensional Measurements of Flame Propagation Velocity and Temperature Distribution of TiH 2 Dust Flame

作　　者：程扬帆[1,2] 王中华 胡芳芳[3] 张蓓蓓 夏煜 沈兆武 CHENG Yangfan;WANG Zhonghua;HU Fangfang;ZHANG Beibei;XIA Yu;SHEN Zhaowu(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232001,Anhui,China;School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China;Anhui Engineering Laboratory of Explosive Materials and Technology,Anhui University of Science and Technology,Huainan 232001,Anhui,China;School of Engineering Science,University of Science and Technology of China,Hefei 230027,Anhui,China)

机构地区：[1]安徽理工大学深部煤矿开采响应与灾害防治国家重点实验室,安徽淮南232001 [2]安徽理工大学化学工程学院,安徽淮南232001 [3]安徽理工大学安徽省爆破器材与技术工程实验室,安徽淮南232001 [4]中国科学技术大学工程科学学院,安徽合肥230027

出　　处：《兵工学报》2023年第4期1181-1192,共12页Acta Armamentarii

基　　金：国家自然科学基金面上项目(12272001、11972046);安徽省自然科学基金优青项目(2108085Y02)。

摘　　要：为探究储氢合金TiH2在温压弹中应用的可行性,利用开放式和半开放式哈特曼管,分别模拟温压弹在空中和地下坑道内的爆炸过程,并利用基于比色测温和轮廓检测技术的高速二维测量平台,研究不同浓度TiH_(2)粉尘云火焰特征参数及其影响因素。实验结果表明:在开放空间内,TiH_(2)粉尘火焰温度在2150~2400 K范围内,随着粉尘浓度的增加,火焰温度呈下降趋势,其初期火焰传播速度和加速度受粉尘浓度影响不大,后期随浓度的增加而增加;在管道受限空间内,不同浓度TiH_(2)粉尘云稳定燃烧的温度都在2430 K左右,粉尘浓度越大、火焰传播到顶部所需时间越短,管道内粉尘的稳定火焰温度较开放空间内的高50~210 K,其火焰传播速度是开放空间内的6~15倍。与传统爆炸测试手段相比,比色测温方法可以准确重构某区域的瞬态温度分布云图,轮廓检测技术可以实现火焰前锋面速度和加速度的精确测量,从而为温压弹的配方设计和毁伤效能鉴定提供了一种新的技术手段。In order to explore the application feasibility of hydrogen storage alloy TiH_(2) in thermobaric bombs,an open and a semi-open Hartmann tube were used to simulate the explosion processes of a thermobaric bomb in the air and underground tunnels,respectively.By using the two-dimensional high-speed measurement platform on basis of the colorimetric thermometry and contour detection methods,flame characteristic parameters and influencing factors of TiH_(2)dust cloud with different concentrations were studied.The experimental results showed that:in the open space,the flame temperature of TiH_(2) dust was in the range of 2150-2400 K,and the flame temperature decreased with the increase of dust concentration;the flame propagation velocity and acceleration were not affected by the dust concentration in the early stage,but increased with the increasing dust concentration in the later stage;in the confined space of a pipeline,the temperature of dust clouds with different concentrations of TiH_(2)during stable combustion were around 2430 K,and the higher the dust concentration,the shorter the flame propagation time to the top;the stable flame temperature of dust clouds in the pipeline was 50-210 K higher than that in the open space,and the flame propagation velocity was 6-15 times than that in the open space.Compared with the traditional explosion testing methods,the colorimetric thermometry method can precisely measure the transient temperature distribution of a certain zone,and the contour detection method can accurately measure the propagation velocity and acceleration of flame front surface,which may provide a new technical means for the formulation design and damage effectiveness evaluation of thermobaric bombs.

关 键 词：温压弹 轮廓检测 火焰速度 比色测温 储氢材料 

分 类 号：O381[理学—流体力学] X932[理学—力学]