Investigation of the Turbulent Flame Speed for Natural Gas and Natural Gas/Hydrogen Mixtures at High Turbulence Levels and Volumetric Heat Release Rates
Investigation of the Turbulent Flame Speed for Natural Gas and Natural Gas/Hydrogen Mixtures at High Turbulence Levels and Volumetric Heat Release Rates
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高湍流水平下天然气和天然气/氢气混合物的湍流火焰速度和体积放热率的研究
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
W. Leuckel
中科院分区：
文献类型：
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作者：
Martin Zajadatz;N. Zarzalis;W. Leuckel
在燃气涡轮机燃烧应用中，存在朝向高体积放热速率的强烈趋势，而不损害点火稳定性以及NOx、CO和未燃烧的烃的低排放浓度的要求。为了满足工业燃气轮机的这些要求，稀薄预混燃烧的概念已经开发。在本文的范围内，基本的实验工作，已进行了半技术规模上的湍流/化学相互作用的重要课题进行了分析，将报告。湍流强度和长度尺度已被改变了一个通用的燃烧器系统，它包括四个几何比例的燃烧器。在大气压条件下，超过700本生型火焰的雷诺数范围从21000至128000已被调查。燃气/空气混合物预热作为燃气轮机中燃烧的典型边界条件已包括在试验中。将天然气与25体积%和50体积%的氢气混合，以改变燃料气体的动力学，评估上述参数对湍流火焰速度的影响，并与现有的湍流火焰速度的相关性进行比较。特别强调了气体/空气混合物预热和动力学的影响。版权所有© 2013 ASME和阿尔斯通技术
In gas turbine combustion application, there is a strong tendency towards high volumetric heat release rates without compromising ignition stability and the requirement of low emission concentrations of NOx, CO and unburned hydrocarbons. In order to meet these demands for industrial gas turbines the lean premixed combustion concept has been developed.In the scope of this paper fundamental experimental work, which has been carried out in order to analyze the important topic of turbulence/chemistry interaction on a semi-technical scale, will be reported. The turbulent intensity and length scales have been varied by a generic burner system, which consists of four geometrically scaled burners. At atmospheric pressure conditions more than 700 Bunsen type flames in a Reynolds number range from 21000 to 128000 have been investigated. Gas/air mixture preheating has been included in the tests as a typical boundary condition for combustion in gas turbines. The natural gas was blended with 25 vol. % and 50 vol. % hydrogen in order to alter the kinetics of the fuel gas.The influence of the aforementioned parameters on the turbulent flame speed were assessed and compared with existing correlations for the turbulent flame speed. Special emphasis has been taken on the influence of gas/air mixture preheating and kinetics.Copyright © 2013 by ASME and Alstom Technology