GOALI: Response of Premixed Swirling Flames to Transverse Acoustic Excitation

目标：预混旋流火焰对横向声激励的响应

• 批准号: 1235779
• 负责人: Tim Lieuwen
• 金额: $ 24.65万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1235779&HistoricalAwards=false
• 关键词: GOALI; Response; Premixed; Swirling; Flames

Combustion instabilities have emerged as the single largest challenge in the development of clean combustion systems for power generation, aircraft engines, and other industrial heating applications. These instabilities cause significant damage to engine hardware, reduce engine operability, and increase production of harmful pollutants. Understanding how flame's respond to acoustic oscillations is a critical, but poorly understood, problem at the root of the instabilities and the focus of this work. This work will utilize state of the art, high speed laser diagnostics to probe the unsteady flow and flame during oscillatory combustion and compare these results to predictive models. The project will directly support one graduate student, while also leveraging other funds to support additional project participants, including undergraduate students and a summer high school teacher. The program has been structured such that research, education, and service are simultaneously performed. For example, the PI will organize opportunities for graduate students to present their research to high school classes and explain the exciting applications of science and mathematics. This program encourages high school students to pursue careers in science and provides the graduate students with teaching experience and community exposure.The knowledge gained from this work will lead to improved understanding of the unsteady fluid mechanics of combusting flows, and how the flames in these devices respond to acoustic excitation. In turn, this fundamental knowledge will enable the design of robust, long lasting energy systems that are low emissions. This work has the strong endorsement and financial support from its industrial partner. The collaboration is structured such that the NSF program will be used to develop diagnostic tools, analysis approaches, and physical constructs for key flame and flow processes. The industrial partner and the PI will work in a parallel program to apply these diagnostic techniques, analysis approaches, and physical insight to actual low emissions hardware.

燃烧不稳定性已经成为开发用于发电、飞机发动机和其他工业加热应用的清洁燃烧系统的最大挑战。 这些不稳定性会对发动机硬件造成严重损害，降低发动机的可操作性，并增加有害污染物的产生。 了解火焰如何响应声振荡是一个关键的，但了解甚少，问题的根源不稳定性和重点这项工作。 这项工作将利用最先进的，高速激光诊断探测振荡燃烧过程中的不稳定流动和火焰，并将这些结果与预测模型进行比较。 该项目将直接支持一名研究生，同时还利用其他资金支持其他项目参与者，包括本科生和一名暑期高中教师。 该计划的结构是同时进行研究，教育和服务。例如，PI将为研究生组织机会，向高中班级介绍他们的研究，并解释科学和数学的令人兴奋的应用。该项目鼓励高中生从事科学事业，并为研究生提供教学经验和社区接触。从这项工作中获得的知识将导致提高对燃烧流的非定常流体力学的理解，以及这些设备中的火焰如何响应声激励。 反过来，这些基本知识将使设计强大，持久的低排放能源系统成为可能。 这项工作得到了工业合作伙伴的大力支持和财政支持。 该合作的结构是这样的，NSF计划将用于开发诊断工具，分析方法和物理结构的关键火焰和流动过程。 工业合作伙伴和PI将在一个平行的计划中工作，将这些诊断技术，分析方法和物理洞察力应用于实际的低排放硬件。