The influence of initial pressure and temperature on hydrogen-air-diluent detonations
The influence of initial pressure and temperature on hydrogen-air-diluent detonations
复制标题
初始压力和温度对氢气-空气-稀释剂爆炸的影响
DOI：
10.1016/0010-2180(91)90082-m
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发表时间：
1991
影响因子：
4.4
通讯作者：
S. Tieszen
中科院分区：
文献类型：
--
作者：
D. Stamps;S. Tieszen
本文研究了压力和温度对用水蒸气或二氧化碳稀释的氢-空气-稀释剂混合物爆轰性的影响。爆轰单元宽度的测量已经获得了在0.43米直径的加热爆轰管进行的实验。计算从Zeldovich-von Neumann-Doring（ZND）模型的爆轰氢氧化的详细化学动力学反应机制被用来关联的数据。数据表明，当温度从293 K升高到373 K时，稀释剂（过量空气或氢气、二氧化碳或蒸汽）抑制爆震的能力显著降低。对于用蒸汽或过量空气稀释的氢-空气混合物，随着约1和3个大气压之间的压力增加，观察到泡孔宽度仅小幅减小。对于存在数据的条件之外，基于模型的计算得出的结果表明，在低初始压力或高初始温度下考虑的所有混合物的爆炸性相似。此外，这些结果表明，在初始压力和温度的变化的细胞宽度的最小值。细胞的最小值表示近似的位置的变化对应于扩展的经典的第二限制标准的速率限制机制。
We have studied the influence of pressure and temperature on the detonability of hydrogen-air-diluent mixtures diluted with steam or carbon dioxide. Detonation cell width measurements have been obtained from experiments conducted in a 0.43-m-diameter heated detonation tube. Calculations from a Zeldovich-von Neumann-Doring (ZND) model of a detonation with a detailed chemical-kinetic reaction mechanism for hydrogen oxidation are used to correlate the data. The data show a significant reduction in the ability of a diluent (excess air or hydrogen, carbon dioxide, or steam) to inhibit a detonation as the temperature is increased from 293 to 373 K. Only a small decrease in the cell width is observed with increasing pressure between approximately 1 and 3 atm for hydrogen-air mixtures diluted with steam or excess air. For conditions beyond which data exist, calculations based on the model yield results that indicate similar detonabilities of all mixtures considered at low initial pressures or high initial temperatures. Additionally, these results indicate minima in the cell width for variations in the initial pressure and temperature. The cell minima represent approximately the location of a change in a rate-limiting mechanism corresponding to the extended classical second-limit criterion.