• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Combustion Science and Technology >INFLUENCE OF WATER SPRAY ON NORMAL AND INVERTED BUNSEN FLAME
【24h】

INFLUENCE OF WATER SPRAY ON NORMAL AND INVERTED BUNSEN FLAME

机译：水喷雾对正常和倒立的Bunsen火焰的影响

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 structure of normal and inverted Bunsen flame tips under the influence of preferential diffusion, flame stretch, and inert (water) spray is theoretically studied using large-activation-energy asymptotics. A completely prevaporized mode and a partially prevaporized mode are identified. Analytic parameters for open and closed flame tips consist of amount of liquid loading and initial droplet size, indicating internal heat loss associated with liquid water vaporization, and negative (or positive) stretch coupled with Lewis number (Le), strengthening (or decreasing) and weakening (or increasing) burning intensity of the Le > 1 and Le < 1 normal (or inverted) Bunsen flame, respectively. For a rich methane/air and lean propane/air normal Bunsen flame (Le > 1) and a lean methane/air and rich propane/air inverted Bunsen flame (Le < 1), closed-tip solutions are obtained. Burning intensity increases toward the flame tip, which has the largest curvature, and is enhanced with decreasing liquid-water loading, increasing initial droplet size, or increasing stretch. Conversely, stretch weakens burning intensity of the lean methane/air and rich propane/air normal Bunsen flame (Le < 1), and the rich methane/air and lean propane/air inverted Bunsen flame (Le > 1), eventually leading to tip opening; that is, flame extinction. Burning intensity is further reduced with increasing liquid-water loading, increasing stretch, or decreasing initial droplet size. In addition, the opening becomes wider for an open-tip normal and inverted Bunsen flame when liquid-water loading or upstream flow velocity increases or initial droplet size decreases.
机译：在理论上使用大激活 - 能量渐近学理论上研究了在优先扩散，火焰拉伸和惰性（水）喷雾的影响下的正常和倒的Bunsen火焰尖端。鉴定了完全普发的模式和部分普发的模式。用于打开和闭合火焰尖端的分析参数由液体负荷量和初始液滴尺寸组成，表明与液体水蒸发相关的内部热量损失，以及与刘易斯数（LE），强化（或减少）和减弱（或增加）Le> 1和Le <1正常（或倒置）Bunsen火焰的燃烧强度。对于富含甲烷/空气和瘦丙烷/空气正常的Bunsen火焰（Le> 1）和瘦甲烷/空气和富丙烷/空气倒置的Bunsen火焰（LE <1），获得闭合尖端溶液。燃烧的强度朝着具有最大曲率的火焰尖端增加，并且随着液体水负荷减小，初始液滴尺寸增加或增加伸展而增强。相反，弹力削弱瘦甲烷/空气和丰富的丙烷/空气正常Bunsen火焰（Le <1），以及丰富的甲烷/空气和瘦丙烷/空气倒立的Bunsen火焰（Le> 1），最终导致提示开幕;也就是说，火焰灭绝。随着液体水负荷，增加的延伸或减小的初始液滴尺寸，燃烧强度进一步降低。另外，当液体 - 水负荷或上游流速增加或初始液滴尺寸减小时，开口对于开口正常和倒置的Bunsen火焰变宽。

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