Combustion Characteristics of Ethanol and PRF Laminar Flames
Combustion Characteristics of Ethanol and PRF Laminar Flames
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乙醇和 PRF 层流火焰的燃烧特性
DOI：
10.1299/kikaib.78.1432
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
J. Hashimoto
中科院分区：
文献类型：
--
作者：
K. Tanoue;Y. Kato;R. Shimada;Kento Iwashimizu;Kentaro Miyawaki;F. Shimada;J. Hashimoto
在这项研究中，乙醇，异辛烷和正庚烷-空气混合物的层流燃烧速度的实验测定了在各种压力下的当量比在很宽的范围内，高达0.5MPa，采用球形膨胀火焰。考虑到非线性外推，拉伸的影响最小化外推参考火焰速度消失拉伸。异辛烷的层流燃烧速度在实验当量比范围内均低于乙醇和正庚烷。对于所有燃料，层流燃烧速度被发现随着初始压力的增加而减小。从纹影图像，乙醇，异辛烷和正庚烷-空气混合物的燃料丰富的区域被发现变得不稳定，在0.1 MPa。对于所有的燃料，增加初始压力被发现得到的火焰更不稳定，并缩小稳定火焰区域。
In this study, laminar burning velocities of ethanol, iso-octane and n-heptane-air mixtures were determined experimentally over a wide range of equivalence ratio under the various pressures up to 0.5MPa, employing spherically expanding flames. Considering non-linear extrapolations, the effects of stretch was minimized by extrapolating the reference flame speed to vanishing stretch. The laminar burning velocities of iso-octane were found to be lower than those of ethanol and n-heptane throughout the range of experimental equivalence ratios. For all fuels, laminar burning velocities were found to decrease with increase initial pressure. From schlieren images, ethanol, iso-octane and n-heptane-air mixtures on the fuel rich region were found to become unstable at 0.1MPa. For all fuels, increasing initial pressure was found to get flame more unstable and narrow the stable flame region.