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Multi-factor influencing on detonation quenching performance of hydrogen crimped-ribbon flame arrester
Journal of Loss Prevention in the Process Industries ( IF 3.5 ) Pub Date : 2023-12-15 , DOI: 10.1016/j.jlp.2023.105236
Chendi Lin , Xingyan Cao , Zhirong Wang , Jianshu Wei , Jianjun Xu , Shaochen Sun

By self-designed experimental apparatus, the influences of initial condition, the structure parameters of flame arrester (FA) and expansion chamber (EC) on hydrogen detonation quenching performance of crimped-ribbon flame arrester are investigated. The effects of different factors on the detonation velocity (Vf) and pressure (Pf) accessing FA, the attenuation extent and the quenching results are determined. The experimental results present that the Vf and Pf exhibit a tendency to increase and then decrease as the hydrogen concentration increases. Both Vf and Pf are raised by enhancing initial pressure and ignition energy, and the attenuation effect of FA is gradually weakened. Meanwhile, the detonation intensity applied to the flame arrester element (FA-E) is reduced due to the attenuation effect of the EC, thus leading to flame being more easily quenched. The baffle and extended type ECs are more effective than the conventional type EC in reducing the detonation velocity, and the quenching performance of extended type EC is better. Then, the reduction of porosity and the rise of element thickness effectively enhance the wall heat transfer and boundary layer effects, resulting in the increasing of velocity deficit and the quenching of detonation. Furthermore, the multi-factor prediction models for Vf and Pf under the action of the initial conditions are built by the response surface method (RSM). The influence extent of factors and their interaction on Vf and Pf are also analyzed and confirmed.



中文翻译:

氢卷曲带阻火器爆轰熄火性能的多因素影响

通过自行设计的实验装置,研究了初始条件、阻火器(FA)和膨胀室(EC)的结构参数对卷曲带阻火器氢爆轰熄火性能的影响。确定了不同因素对FA的爆速( V f )和压力( P f )、衰减程度和淬火结果的影响。实验结果表明,随着氢浓度的增加, V fP f呈现先增大后减小的趋势。通过提高初始压力和点火能量,Vf和Pf升高FA的衰减作用逐渐减弱同时,由于EC的衰减作用,施加在阻火元件(FA-E)上的爆轰强度降低,从而导致火焰更容易熄灭。挡板加长型EC比常规型EC更能有效降低爆速,且加长型EC的熄火性能更好。然后,孔隙率的降低和元件厚度的增加有效地增强了壁面传热和边界层效应,导致速度赤字增加和爆轰熄灭。进一步利用响应面法(RSM)建立了初始条件作用下V fP f的多因素预测模型。并分析并确定了各因素的影响程度及其交互作用对V fP f的影响。

更新日期:2023-12-15
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