Suppression of hydrogen-air detonation using porous materials in the channels of different cross section
Suppression of hydrogen-air detonation using porous materials in the channels of different cross section
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DOI：
10.1016/j.ijhydene.2021.01.052
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发表时间：
2021-03-24
影响因子：
7.2
通讯作者：
Golovastov, S., V
中科院分区：
文献类型：
--
作者：
Bivol, G. Yu;Golovastov, S., V
实验研究了爆轰波在不同截面多孔通道中的传播。实验在截面尺寸分别为20 × 40 mm、10 × 40 mm和10 × 30 mm的矩形通道中进行，通道两侧壁面覆盖多孔材料，以研究大气压下化学计量比的氢气-空气混合物的爆震抑制。爆轰是在3000毫米长的圆形通道，直径为20毫米。多孔材料覆盖通道内表面的1/2或1/3。每英寸孔数为10至80的聚氨酯泡沫用于爆炸衰减。采用压电压力传感器测量冲击波压力。爆轰衰减成冲击波和火焰阵面可视化使用纹影摄影。还使用高速纹影图像序列计算了冲击波速度。在10 mm宽的通道中记录到最强的压力衰减，该通道具有覆盖1/3内壁的最大孔（2.5 mm）的多孔涂层。结果表明，即使覆盖通道内表面的1/3，也会导致爆轰衰减和显著的冲击波衰减。(c)2021年氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
Propagation of a detonation wave in a porous channel with different cross-section was experimentally studied. Experiments were performed in three rectangular channels with cross-sectional dimensions of 20 x 40 mm, 10 x 40 mm and 10 x 30 mm with two opposite walls covered with porous material to study the detonation suppression in stoichiometric hydrogen-air mixtures at atmospheric pressure. Detonation was initiated in 3000 mm long circular channel 20 mm in diameter. Porous material was covering 1/2 or 1/3 of the channel internal surface. Polyurethane foam with a number of pores per inch ranging from 10 to 80 was used for detonation attenuation. Piezoelectric pressure sensors were used to obtain the shock wave pressure. Detonation decay into the shock wave and the flame front was visualized using schlieren photography. Shock wave velocity was also calculated using high-speed schlieren image sequences. The strongest pressure attenuation was recorded in a 10 mm wide channel with a porous coating with largest pores (2.5 mm) covering 1/3 of the internal walls. The results indicate that even covering 1/3 of the internal surface of the channel leads to detonation decay and significant shock wave attenuation.(c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.