孔隙比对氢气爆轰波结构的定量影响

Quantitative Effect of Void Ratio on Hydrogen Detonation Wave Structure

氢能作为一种清洁高效的可再生能源,发展前景广阔,但其在使用、运输和储存过程中极易引起爆炸事故,严重威胁到人们的生命财产安全。研究氢气预混气爆轰波传播的抑制措施具有重要意义。针对管廊内的2H_(2)+O_(2)+3Ar预混气爆轰传播机理和多组多孔材料对爆轰波声学特性、传播速度的影响进行了实验研究。在光滑管道内安设Al_(2)O_(3)泡沫陶瓷,随着Al_(2)O_(3)泡沫陶瓷的孔隙密度增大,管道内爆轰轨迹–管轴夹角实测值与理论值偏差变大,管径–螺距比与声学理论值偏差变大,爆轰波螺旋频率降低。在光滑管道内安设泡沫铁镍金属,左旋波及右旋波轨迹–管轴夹角实测值与声学理论值偏差变大。这一发现可以为氢气利用过程中的安全问题提供新的解决思路,为我国双碳目标做出一定的贡献。

As a clean and efficient renewable energy,hydrogen energy has a broad development prospect.However,it is easy to cause explosion accidents in the process of use,transportation and storage,which seriously threatens the safety of people’s lives and property.It is of great significance to study the suppression measures of detonation wave propagation in hydrogen premixed gas.The detonation propagation mechanism of 2H_(2)+O_(2)+3Ar premixed gas in the pipe gallery and the effect of multiple porous materials on the acoustic characteristics and propagation velocity of detonation wave were experimentally studied.Al_(2)O_(3)foam ceramics are installed in the smooth pipe.With the increase of the pore density of Al_(2)O_(3)foam ceramics,the deviation between the measured value and the theoretical value of the included angle between the detonation trajectory and the pipe axis in the pipe becomes larger,the deviation between the pipe diameter pitch ratio and the acoustic theoretical value becomes larger,and the helical frequency of the detonation wave decreases.When the foam iron nickel metal is installed in the smooth pipe,the deviation between the measured value of the left-hand and right-hand wave track pipe axis angle and the acoustic theoretical value becomes larger.This discovery can provide a new solution to the safety problems in the process of hydrogen utilization,and make a certain contribution to China’s double carbon goal.