Imaging of Local Flame Chemistry and Flame Stretch to Improve Turbulent Combustion Models

局部火焰化学和火焰拉伸成像以改进湍流燃烧模型

• 批准号: 9529203
• 负责人: James Driscoll
• 金额: $ 27万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-04-15 至 1999-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529203&HistoricalAwards=false
• 关键词: Imaging; Local; Flame; Chemistry; Stretch

Abstract Driscoll 9529203 The objective of the proposed research is to quantify and model the complex chemistry and stretch effects that occur within a premixed flame as it undergoes a turbulent wrinkling process. This proposal is a continuation of a previously NSF funded program. The PI plans to make use of a variety of laser diagnostic techniques to investigate two model problems relevant to premixed turbulent combustion. These unique flame experiments include: (1) the interaction of a flame front with an isolated vortex, and (2) the flame propagation in an isotropic homogeneous turbulent flow in a long channel, generated by a set of fans. The PI plans to measure profiles of important radical species, including CH, OH, O and H, and the stretch rates and vorticity along a premixed flame as it undergoes an unsteady wrinkling process. He also plans to obtain advanced Direct Numerical Simulations (DNS) with complex chemistry and compare results to both the flame-vortex and the homogeneous turbulence experiments, and to use the results to measure quantities that are required by other types of models.

提出的研究目标是量化和模拟复杂的化学和拉伸效应，发生在一个预混火焰，因为它经历了湍流起皱过程。该提案是先前NSF资助项目的延续。PI计划利用各种激光诊断技术来研究与预混湍流燃烧相关的两个模型问题。这些独特的火焰实验包括：(1)火焰锋面与孤立涡的相互作用；(2)由一组风扇产生的长通道内各向同性均匀湍流中的火焰传播。PI计划测量包括CH， OH， O和H在内的重要自由基的分布，以及预混火焰在经历非定常起皱过程时的拉伸率和涡度。他还计划获得具有复杂化学性质的高级直接数值模拟（DNS），并将结果与火焰涡和均匀湍流实验进行比较，并使用结果来测量其他类型模型所需的数量。