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Experimental Uncertainties of the Heat Flux Method for Measuring Burning Velocities

机译：热通量法测量燃烧速度的实验不确定性

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摘要

The laminar burning velocity is a fundamental property of combustible mixtures important for kinetic model validation as well as for practical applications. Many efforts are directed towards its accurate determination. The heat flux method is one of the commonly recognized methods for measuring laminar burning velocity, however, the information on the accuracy of the method is scattered in the literature. In the present work, an attempt was made to summarize and extend the available information on the different factors contributing to the experimental uncertainty of the heat flux method. Experimental setup of the Lund University group, typical for the heat flux community, and the procedures used to determine the burning velocity are described. Furthermore, the influence of different uncertainty factors, originating from each part of the setup, is analyzed. Asymmetric heat fluxes and the method for determining flame surface area were found to give an important contribution to the total error. As a result of this, some of the previously published data have been re-evaluated. Finally, recommendations are presented on how to control or reduce the uncertainties in the heat flux measurements, and possible directions for future research, aimed at improvement of the accuracy and understanding of the method, are outlined.
机译：层流燃烧速度是可燃混合物的基本特性，对于动力学模型验证以及实际应用很重要。许多努力都针对其准确确定。热通量法是测量层流燃烧速度的公认方法之一，但是，有关该方法准确性的信息散布在文献中。在目前的工作中，试图总结和扩展有关影响热通量方法实验不确定性的不同因素的可用信息。介绍了隆德大学小组的实验设置（典型的热通量社区）以及确定燃烧速度的步骤。此外，分析了来自设置各部分的不同不确定性因素的影响。发现不对称热通量和确定火焰表面积的方法对总误差有重要贡献。结果，一些先前发布的数据已被重新评估。最后，提出了有关如何控制或减少热通量测量结果不确定性的建议，并概述了未来研究的可能方向，旨在提高准确性和对方法的理解。

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