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首页> 外文期刊>Journal of Hazardous Materials >Temperature and pressure influence on maximum rates of pressure rise during explosions of propane-air mixtures in a spherical vessel
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Temperature and pressure influence on maximum rates of pressure rise during explosions of propane-air mixtures in a spherical vessel

机译：温度和压力对球形容器中丙烷-空气混合物爆炸过程中最大压力上升速率的影响

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摘要

The maximum rates of pressure rise during closed vessel explosions of propane-air mixtures are reported, for systems with various initial concentrations, pressures and temperatures ([C_3H_8] = 2.50-6.20 vol.%, p_0 = 0.3-1.3 bar; To = 298-423 K). Experiments were performed in a spherical vessel (0 = 10 cm) with central ignition. The deflagration (severity) index K_G, calculated from experimental values of maximum rates of pressure rise is examined against the adiabatic deflagration index, K_(G,ad), computed from normal burning velocities and peak explosion pressures. At constant temperature and fuel/oxygen ratio, both the maximum rates of pressure rise and the deflagration indices are linear functions of total initial pressure, as reported for other fuel-air mixtures. At constant initial pressure and composition, the maximum rates of pressure rise and deflagration indices are slightly influenced by the initial temperature; some influence of the initial temperature on maximum rates of pressure rise is observed only for propane-air mixtures far from stoichiometric composition. The differentiated temperature influence on the normal burning velocities and the peak explosion pressures might explain this behaviour.
机译：对于各种初始浓度，压力和温度（[C_3H_8] = 2.50-6.20 vol。％，p_0 = 0.3-1.3 bar； To = 298）的系统，报告了丙烷-空气混合物在密闭容器爆炸期间最大的压力上升速率。 -423 K）。实验是在带有中央点火装置的球形容器（0 = 10厘米）中进行的。根据最大燃烧速率的实验值计算出的爆燃（严重性）指数K_G，与根据正常燃烧速度和爆炸峰值压力计算出的绝热爆燃指数K_（G，ad）进行了比较。在恒定温度和燃料/氧气比率下，最大升压速率和爆燃指数均是总初始压力的线性函数，如其他燃料-空气混合物所报道的那样。在恒定的初始压力和组成下，初始温度会略微影响最大压力上升率和爆燃指数。仅对于远离化学计量组成的丙烷-空气混合物，才观察到初始温度对最大压力升高速率的一些影响。不同的温度对正常燃烧速度和峰值爆炸压力的影响可能解释了这种行为。

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  • 来源
    《Journal of Hazardous Materials》 |2011年第3期|p.891-896|共6页
  • 作者

    D. Razus; V. Brinzea; M. Mitu; C. Movileanu; D. Oancea;

  • 作者单位

    "Hie Murguiescu" Institute of Physical Chemistry, 202 Spl. Independentei, 060021 Bucharest, Romania;

    "Hie Murguiescu" Institute of Physical Chemistry, 202 Spl. Independentei, 060021 Bucharest, Romania;

    "Hie Murguiescu" Institute of Physical Chemistry, 202 Spl. Independentei, 060021 Bucharest, Romania;

    "Hie Murguiescu" Institute of Physical Chemistry, 202 Spl. Independentei, 060021 Bucharest, Romania;

    Department of Physical Chemistry, University of Bucharest, 4-12 Regina Elisabeta Blvd., 030018 Bucharest. Romania;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    explosion; maximum rate of pressure rise; deflagration index; spherical vessel; propane;

    机译：爆炸;最大压力上升率;爆燃指数;球形容器;丙烷;

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