Laminar burning velocity measurements in constant volume vessels - Reconciliation of flame front imaging and pressure rise methods
Laminar burning velocity measurements in constant volume vessels - Reconciliation of flame front imaging and pressure rise methods
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DOI：
10.1016/j.fuel.2017.09.031
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发表时间：
2018-01-01
期刊：
影响因子：
7.4
通讯作者：
Cracknell, Roger
中科院分区：
文献类型：
--
作者：
Hinton, Nathan;Stone, Richard;Cracknell, Roger
在定容容器中用火焰前缘成像法和压力上升法测量了层流燃烧速度。只要使用适当的技术分析数据，两种不同方法的结果是相同的。比较与空气的甲烷，乙醇和沼气（60%的甲烷，40%的二氧化碳）的混合物的层流燃烧速度为广泛的可燃混合物在2和4巴的压力和温度为380和450 K的测量层流燃烧速度的方法仍然是有争议的主题，不同的研究人员青睐不同的方法。明火技术非常流行，所谓的热通量方法现在已经很好地建立起来。使用恒定体积燃烧容器的替代技术也是常用的，并且具有两种不同的用途：在恒定压力条件下对火焰前缘传播进行成像，或者结合恒定体积燃烧模型测量压力升高。压力上升方法需要更复杂的分析，但其优点是，单个实验可以生成一系列相关温度和压力的数据，并且压力和温度上升也意味着可以获得类似发动机条件的数据。
Laminar burning velocity measurements have been made in a constant volume vessel using both flame front imaging and the pressure rise methods. Results from the two different methods are shown to be the same, so long as appropriate techniques are used for analysing the data. Comparisons are presented for the laminar burning velocity of mixtures with air of methane, ethanol and biogas (60% methane, 40% carbon dioxide) for a wide range of flammable mixtures at pressures of 2 and 4 bar and temperatures of 380 and 450 K.Methods for measuring the laminar burning velocity are still the subject of controversy, with different researchers favouring different approaches. Open flame techniques are very popular and the so-called heat flux method is now well established. The alternative technique of using a constant volume combustion vessel is also in common use, and has two distinct methods of use: either the imaging of flame front propagation at conditions of constant pressure, or the measurement of the pressure rise combined with a constant volume combustion model. The pressure rise method requires a more complex analysis, but has the advantage that a single experiment generates data across a range of linked temperatures and pressures, and the pressure and temperature rise also mean that data can be obtained for engine-like conditions.