• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aerospace science and technology >Experimental study of flame characteristics of ethylene and its mixture with methane and hydrogen in supersonic combustor
【24h】

Experimental study of flame characteristics of ethylene and its mixture with methane and hydrogen in supersonic combustor

机译：超音速燃烧器中乙烯及其与甲烷和氢气的混合物的燃烧特性实验研究

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

In this paper, flame characteristics of ethylene and its mixture with methane and hydrogen in process of ignition in a Mach 2.5 supersonic model combustor are studied. Development of flame structure is visualized with CH* chemiluminescence images recorded by high-speed camera. The dominant frequencies associated with flame oscillations are identified via fast-response pressure measurements. The present results show that there are two typical flame structures of triangle-shape and ellipse-shape found at relatively low and high fuel-to-air equivalence ratios respectively. The triangular flame at low equivalence ratios is mainly located in the shear layer of cavity flow and has small oscillations featured with low frequencies. At high fuel-to-air equivalence ratios, flame moves upstream and is anchored at the front edge of the cavity with elliptic shape and larger oscillations. The wall pressure distributions indicate that shock structures are formed in the isolator upstream of fuel injections at high equivalence ratios, leading to low speed flow in vicinity of fuel injections and causing flame move forward and change shape. Dominant frequencies from 49 Hz to 317 Hz are found for ethylene or mixture fuels. As fuel-to-air equivalence ratio increases, the dominant frequencies become smaller. For mixture fuel with hydrogen and methane, similar ignition process and flame structures are observed. However, the dominant frequencies related to flame oscillations for mixture fuels are not the same due to different combustion performance and thermal dissipation on turbulent flow. (C) 2019 Published by Elsevier Masson SAS.
机译：本文研究了Mach 2.5超声速模型燃烧室中乙烯及其与甲烷和氢气的混合物在燃烧过程中的燃烧特性。火焰结构的发展通过高速相机记录的CH *化学发光图像可视化。通过快速响应的压力测量可以确定与火焰振荡相关的主频。目前的结果表明，分别在相对较低和较高的燃料-空气当量比下发现了两种典型的三角形和椭圆形火焰结构。低当量比的三角形火焰主要位于腔流的剪切层中，并且具有较小的低频振荡。在高的燃油/空气当量比下，火焰向上游移动，并以椭圆形和较大的振动锚定在腔体的前边缘。壁压力分布表明，在燃油喷射上游的隔离器中以高当量比形成了冲击结构，导致燃油喷射附近的低速流动，并导致火焰向前移动并改变了形状。对于乙烯或混合燃料，发现的主频为49 Hz至317 Hz。随着燃料/空气当量比的增加，主频变小。对于具有氢气和甲烷的混合燃料，观察到类似的着火过程和火焰结构。然而，由于不同的燃烧性能和湍流的热耗散，与混合燃料的火焰振荡有关的主导频率并不相同。 （C）2019由Elsevier Masson SAS发布。

著录项

  • 来源
    《Aerospace science and technology》 |2019年第3期|775-781|共7页
  • 作者

    Zhong Fengquan; Cheng Liuwei; Gu Hongbin; Zhang Xinyu;

  • 作者单位

    Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;

    Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Supersonic combustor; Hydrocarbon; Mixture fuel; Flame structure; Ignition;

    机译：超音速燃烧器;碳氢化合物;混合燃料;火焰结构;点火;

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