...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Influences of acoustic instabilities on turbulent-flame propagation
【24h】

Influences of acoustic instabilities on turbulent-flame propagation

机译：声学不稳定性对湍流火焰传播的影响

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

Influences of acoustic instabilities on premixed turbulent-flames have been studied experimentally in a Taylor Couette (TC) combustor for downward flame propagation in a turbulent Row-field generated in the annulus between two cylinders. Flow-field velocities were measured at a fixed location upstream of the propagating name using laser-doppler velocimetry. while flame speeds were determined from video-recorded images. It is found that the existence of pre-ignition turbulence in the combustor (generated by rotation of the combustor-cylinder walls) does not eliminate acoustic instabilities, however as the level of pre-ignition turbulence is increased the influence of the secondary acoustic instability on the turbulent-flame speed becomes insignificant. Fur low intensities of pm-e-ignition turbulence the flame is found to accelerate during the latter stages of name propagation, while fur high levels of preignition turbulence the name propagates at a statistically constant speed, even though velocity fluctuations have been substantially amplified by the time the flame reaches the bottom end of the combustor as a result of acoustic instability. (C) 2000 Elsevier Science Inc. All rights reserved. [References: 10]
机译：已经在泰勒·库埃特（TC）燃烧器中实验研究了声不稳定性对预混湍流火焰的影响，该燃烧器用于在两个圆柱体之间的环形空间中产生的湍流行场中向下传播火焰。使用激光多普勒测速仪在传播名称上游的固定位置测量流场速度。而火焰速度是根据录像图像确定的。发现燃烧室中存在着由燃烧室气缸壁旋转产生的点火前湍流并不能消除声学不稳定性，但是随着点火前湍流水平的增加，二次声学不稳定性对湍流的火焰速度变得微不足道。低强度的pm-e点火湍流发现火焰在名称传播的后期阶段加速，而高水平的点火前湍流名称以统计上恒定的速度传播，即使速度波动已被噪声放大了。由于声学不稳定，火焰到达燃烧室的底部。 （C）2000 Elsevier Science Inc.保留所有权利。 [参考：10]

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