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Normal burning velocity and propagation speed of ethane-air: Pressure and temperature dependence

机译：乙烷-空气的正常燃烧速度和传播速度：压力和温度依赖性

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摘要

Experiments in a spherical bomb with central ignition using ethane-air mixtures of variable composition ([C2H6] = 3.4-7.6 vol%), at various initial pressures (p(0) = 30-130 kPa) and initial temperatures (T-0 = 298-423 K) afforded the calculation of the normal burning velocities S-u and propagation velocities S-s. The normal burning velocities (NBV) were determined from the coefficients of the cubic law of pressure rise during the early stage of explosion, using a previously proposed procedure. The propagation velocities (PV) were calculated from the normal burning velocities using the expansion coefficient of the unburnt gas during isobaric combustion. The experimental NBVs are examined against computed values, obtained with the package INSFLA for free laminar premixed flames, using the mechanism CH4-C-4 based on 53 chemical species, which participate to 592 elementary reactions. The baric and thermal coefficients of NBVs and of PVs are determined and discussed in comparison with literature data. (C) 2015 Elsevier Ltd. All rights reserved.
机译：在具有不同成分（[C2H6] = 3.4-7.6 vol％），各种初始压力（p（0）= 30-130 kPa）和初始温度（T-0）的乙烷-空气混合物的集中点火的球形炸弹中进行实验= 298-423 K）提供了正常燃烧速度Su和传播速度Ss的计算。正常燃烧速度（NBV）是使用先前提出的程序从爆炸早期的压力上升立方定律的系数确定的。使用等压燃烧过程中未燃烧气体的膨胀系数，从正常燃烧速度计算出传播速度（PV）。使用基于基于53种化学物质的CH4-C-4机制的INSFLA软件包针对自由层流预混火焰获得的计算值检查了实验NBV的计算值，该机理参与了592个基本反应。确定并讨论了NBV和PV的压力系数和热系数，并与文献数据进行了比较。 （C）2015 Elsevier Ltd.保留所有权利。

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