...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Combustion and Flame >Investigation of the measurement characteristics of a multiple-ion-probe method for a propagating methane-oxygen-nitrogen flame
【24h】

Investigation of the measurement characteristics of a multiple-ion-probe method for a propagating methane-oxygen-nitrogen flame

机译：甲烷-氧-氮火焰传播的多离子探针法测量特性研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The multiple-ion-probe measurement method is a method to measure a propagating flame using ion probes installed on the wall surface of a combustion chamber. The dynamic behavior of the propagating flame along the wall surface can be regenerated from the dataset of flame signals from individual ion probes. Although this method only captures flames near the wall surface, the flame propagation behavior can be indirectly visualized. Because this method can attain very high temporal resolution, it can provide precise measurements of high-speed phenomena such as knocking in spark-ignition engines and detonation in detonation combustors. This study aimed to investigate the ability of a developed 64-channel multiple-ion-probe measurement system to characterize a propagating flame. To this end, three flames with substantially different propagation velocities were measured using the proposed multiple-ion-probe measurement system. During the experiments, methane-oxygen stoichiometric mixtures diluted with different amounts of nitrogen were used. The flame propagation velocity varied within the range of several m/s for a turbulent flame to 2.4km/s for detonation by varying the dilution ratio of nitrogen. In the case where a mixture with a nitrogen mole fraction of 0.71 was used, a phenomenon of repeating stagnation and reacceleration of the propagating flame was observed. Furthermore, the phenomenon considered to be flame quenching was also observed near the wall. In the case of no dilution (nitrogen mole fraction = 0.00), multiple-ion probes with an installation interval of 1.5 mm indicated that the velocity fluctuated within the range of -500m/s to +2000 m/s with respect to the Chapman-Jouguet detonation velocity of 2390 m/s. Experiments involving soot foil recording conducted in parallel confirmed that this velocity fluctuation was derived from the detonation cell structure and that micro-explosions in the detonation front could be captured using the multiple-ion-probe method. (C) 2019 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：多离子探针测量方法是一种使用安装在燃烧室壁面上的离子探针测量正在传播的火焰的方法。沿壁表面传播的火焰的动态行为可以从单个离子探针发出的火焰信号数据集中重新生成。尽管此方法仅捕获壁表面附近的火焰，但可以间接地看到火焰传播行为。因为这种方法可以获得很高的时间分辨率，所以它可以提供高速现象的精确测量值，例如爆震火花点火发动机和爆震燃烧室的爆震。这项研究旨在调查已开发的64通道多离子探针测量系统表征正在传播的火焰的能力。为此，使用提出的多离子探针测量系统测量了三个传播速度基本不同的火焰。在实验过程中，使用了用不同量的氮气稀释的甲烷-氧气化学计量混合物。通过改变氮气的稀释比，火焰传播速度在湍流火焰的几m / s到爆震的2.4km / s的范围内变化。在使用氮摩尔分数为0.71的混合物的情况下，观察到了传播火焰反复停滞和再加速的现象。此外，在壁附近也观察到被认为是火焰淬灭的现象。在不稀释的情况下（氮气摩尔分数= 0.00），安装间隔为1.5 mm的多离子探针表明，相对于Chapman-，速度在-500m / s至+2000 m / s的范围内波动Jouguet爆炸速度为2390 m / s。涉及并行进行烟灰箔记录的实验证实，该速度波动是由爆炸单元结构引起的，并且可以使用多离子探针方法捕获爆炸前沿的微爆炸。 （C）2019燃烧研究所。由Elsevier Inc.出版。保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号