...
首页> 外文期刊>Applied physics. B, Lasers and optics >Method for absolute OH-concentration measurements in premixed flames by LIF and numerical simulations
【24h】

Method for absolute OH-concentration measurements in premixed flames by LIF and numerical simulations

机译:LIF和数值模拟的预混火焰中绝对OH浓度测量方法

获取原文
获取原文并翻译 | 示例
           

摘要

We present and apply a methodology for the single-shot measurement of absolute concentrations of the OH-radical in a turbulent, premixed natural gas/air flame. The method is based on a combination of detailed numerical simulations of the turbulent flame and an experimental approach using planar laser-induced fluorescence (LIF). The numerical simulation is used to predict LIF intensities. It shows the existence of a sharp correlation between the LIF signal after excitation of the A-X(3,0) P_2(8) transition near 248.45 nm and OH concentrations for a wide range of conditions, including stationary and instationary laminar flames of different strain rates, with different models to treat molecular transport and different degrees of heat loss. This correlation allows the transformation of measured OH-LIF intensity images into absolute OH concentration maps.
机译:我们提出并应用一种方法对湍流,预混天然气/空气火焰中的OH自由基的绝对浓度进行单次测量。该方法基于湍流火焰的详细数值模拟与使用平面激光诱导荧光(LIF)的实验方法的结合。数值模拟用于预测LIF强度。它显示了在宽范围的条件下,包括不同应变率的固定层和固定层流火焰,在248.45 nm附近激发AX(3,0)P_2(8)跃迁之后的LIF信号与OH浓度之间存在明显的相关性。 ,用不同的模型来处理分子运输和不同程度的热损失。这种相关性允许将测量的OH-LIF强度图像转换为绝对OH浓度图。

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