• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>US National Combustion Meeting >Time-Resolved Particle Image Velocimetry of Non-Reacting Flow in a Swirl-Stabilized Combustor without and with Foam Inserts for Acoustic Control
【24h】

Time-Resolved Particle Image Velocimetry of Non-Reacting Flow in a Swirl-Stabilized Combustor without and with Foam Inserts for Acoustic Control

机译：在旋流稳定的燃烧器中的非反应流动的时间分辨颗粒图像速度，没有以及用于声学控制的泡沫插入物

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Combustion noise and thermo-acoustic instabilities are of great importance in highly critical applications such as rocket propulsion systems, power generation, and jet propulsion engines. In our previous studies, we have utilized foam inserts to suppress combustion noise and thermo-acoustic instabilities in lean premixed (LPM) and lean direct injection (LDI) combustion systems. While these studies demonstrated efficacy of the foam insert concept to mitigate noise and instability in gaseous and liquid fuel combustion systems, the actual mechanisms involved have not been understood. Present study is a step towards overcoming this gap by examining the non-reacting flow field without and with foam inserts using time-resolved Particle Image Velocimetry (PIV). The experimental setup consists of a swirl-stabilized combustor without and with the foam inserts placed at the dump plane. Seeded air flow enters the combustor through the mixing chamber located upstream of the dump plane. Baseline measurements taken without the foam insert are compared to the measurements acquired with foam insert. Although the flow field inside the annulus of the foam insert was optically inaccessible, measurements immediately downstream of the foam insert provide insight into the instantaneous flow field and turbulence characteristics. The study highlights the role of the foam insert on flow and turbulence structure, which ultimately affects the acoustics behavior of the combustor in a favorable manner.
机译：在火箭推进系统，发电和喷射推进发动机等高度关键的应用中，燃烧噪声和热声无限度非常重要。在我们以前的研究中，我们利用泡沫插入物来抑制精益预混（LPM）和瘦直喷（LDI）燃烧系统中的燃烧噪声和热声稳定性。虽然这些研究表明了泡沫插入概念以减轻气体燃料燃烧系统中的噪声和不稳定性的效果，但尚未理解所涉及的实际机制。目前的研究是通过使用时间分辨粒子图像速度（PIV）检查非反应流场来克服这种差距的步骤。实验装置包括旋流稳定的燃烧器，没有和泡沫插入物放置在倾卸平面上。种子空气流通过位于倾卸平面上游的混合室进入燃烧器。将没有泡沫插入物的基线测量与用泡沫插入件所获得的测量进行比较。尽管泡沫插入件的环内的流场是光学难以接近的，但是在泡沫插入物的下游的测量提供了进入瞬时流场和湍流特性的洞察力。该研究突出了泡沫插入件在流动和湍流结构上的作用，这最终以有利的方式影响燃烧器的声学行为。

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