Experimental study on detonation-diffraction reflection point distances in hydrogen and gaseous hydrocarbon reactive systems
Experimental study on detonation-diffraction reflection point distances in hydrogen and gaseous hydrocarbon reactive systems
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DOI：
10.1016/j.combustflame.2022.112329
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发表时间：
2022-11
影响因子：
4.4
通讯作者：
Hanxing Sun;A. Kawasaki;N. Itouyama;K. Matsuoka;J. Kasahara
中科院分区：
文献类型：
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作者：
Hanxing Sun;A. Kawasaki;N. Itouyama;K. Matsuoka;J. Kasahara
本文研究了Kawasaki和Kasahara(2020)在更大范围的燃料-氧化剂混合物中用反射点距离表示的绕射爆轰波临界条件。在H_2/O_2、C_2H_2/O_2、C_2H_4/O_2、C_2H_6/O_2、C_3H_6/O_2、C_2H_6/N_2O、C_3H_6/N_2O等混合气体中，通过修正混合气在室温下的初始压力和当量比来测量反射点的距离。此外，在爆轰绕射临界条件区确定了临界理想反射点距离除以通道宽度这一无量纲参数。结果表明，尽管当量比不同，但对于所有被研究的混合物，该区域都在3.8±100.8的范围内。参数lr，ip0是理想反射点距离和初始压力的乘积，与重新启动所需的单位面积能量(功)成正比。反射点距离和初始压力的乘积越大，混合物二次起爆的难度越大，该参数的倒数代表二次起爆的难易程度，可视为爆破性的一个指标。在化学计量比附近，可分离性的顺序为C2H2/O2>；C2H4/O2>；C2H4/O2>；C3H6/O2>；C2H6/O2>；H2/O2；H2/O2，这与Matsui和Lee的临界引发能的情况类似。
In this study, the critical conditions of diffracted detonation waves expressed in terms of reflection point distances in Kawasaki and Kasahara (2020) were investigated for a wider range of fuel-oxidizer mixtures. In H2/O2, C2H2/O2, C2H4/O2, C2H6/O2, C3H6/O2, C2H6/N2O, and C3H6/N2O mixtures, these mixtures are used to measure the reflection point distance through the modification of the initial pressure and equivalence ratio of the mixture at room temperature. Moreover, the critical ideal reflection point distance divided by the channel width, which this dimensionless parameter was identified in the critical condition region of detonation diffraction. The results revealed that this region was in the range of 3.8 ± 0.8 for all investigated mixtures even though the equivalence ratio varied. The parameterlr,ip0is the product of the ideal reflection point distance and the initial pressure, which is proportional to the energy (work) per unit area required for re-initiation. The larger the product of the reflection point distance and the initial pressure, the more difficult the mixture is to re-initiate, and the inverse of this parameter represents the ease of re-initiation, which can be considered an index of detonability. Detonability, which is the objective of clarification in this study, was found to have the order C2H2/O2> C2H4/O2> C3H6/O2> C2H6/O2> H2/O2in the vicinity of the stoichiometric ratio, which is similar to the case using Matsui and Lee's critical initiation energy.