...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Impact of finite rate chemistry on the hydrodynamic stability of shear flows in turbulent lean premixed combustion
【24h】

APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Impact of finite rate chemistry on the hydrodynamic stability of shear flows in turbulent lean premixed combustion

机译：APS-APS流体动力学分部第70届年会-事件-有限速率化学对湍流稀薄预混燃烧中剪切流的水动力稳定性的影响

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

摘要

Recent experimental observations show that the dynamic response of a reactive flow is strongly impacted by the fuel chemistry. In order to gain insight into some of the underlying mechanisms we formulate a new linear stability model that incorporates the impact of finite rate chemistry on the hydrodynamic stability of shear flows. Contrary to previous studies which typically assume that the velocity field is independent of the kinetic rates, the velocity field in our study is coupled with the temperature field. Using this formulation, we reproduce previous results, e.g., most unstable global modes, obtained for non-reacting shear flow. Moreover, we show that these modes are significantly altered in frequency and gain by the presence of a reaction region within the shear layer. This qualitatively agrees with results of our recent experimental and numerical studies, which show that the flame surface location relative to the shear layer influences the stability characteristics in combustion tunnels. This study suggests a physical explanation for the observed impact of finite rate chemistry on shear flow stability.
机译：最近的实验观察表明，反应流的动态响应受到燃料化学的强烈影响。为了深入了解某些基本机理，我们制定了一个新的线性稳定性模型，该模型结合了有限速率化学对剪切流的水动力稳定性的影响。与以前的研究（通常假设速度场与动力学速率无关）相反，我们研究中的速度场与温度场耦合。使用此公式，我们可以重现以前的结果，例如，对于非反应性剪切流获得的最不稳定的整体模式。此外，我们表明，剪切模式中存在反应区域，这些模式在频率和增益上都发生了显着变化。这在质量上与我们最近的实验和数值研究结果吻合，后者表明火焰表面相对于剪切层的位置会影响燃烧隧道的稳定性。这项研究为观察到的有限速率化学对剪切流稳定性的影响提供了物理解释。

著录项

相似文献

  • 外文文献
  • 中文文献
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