GOALI: Dynamics of Reacting Jets in Cross-Flow

GOALI：错流中反应射流的动力学

• 批准号: 1705649
• 负责人: Tim Lieuwen
• 金额: $ 27万
• 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: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1705649&HistoricalAwards=false
• 关键词: GOALI; Dynamics; Reacting; Jets; Cross

Gas turbine power plants are a major enabler for both land-based power generation and air-breathing aircraft propulsion. These power plants consist of several components, at the heart of which is the combustor. In a combustor, rapid mixing of air and fuel is required for efficient combustion and cooling of combustor parts. This critical feature constitutes the use of the fluid dynamic benefits of a jet-in-crossflow configuration. In this configuration, a jet is injected in a perpendicular direction to a crossflow, resulting in complex fluid mechanic characteristics that can be leveraged for the above applications. Thus, the broad focus on this project is the fundamental physics in the fluid mechanics and combustion of a jet-in-crossflow configuration. Understanding these physics is critical to the design of the next generation clean and efficient gas turbines for the U.S. aerospace and power generation industries.The specific objective of the proposed work is to improve the understanding of the dynamics of reacting jets in crossflow. Jets in crossflow are an important fundamental problem that incorporates partially premixed flame propagation in highly strained flows, non-premixed flame autoignition, edge flame propagation, and hydrodynamic stability in reacting flows. It is an important canonical problem where chemical kinetics and hydrodynamic stability of the flow are tightly coupled. This project will focus on two major thrusts. The first thrust will address the question of the impacts of exothermicity and kinetics on the topology and hydrodynamic stability. In particular it will address the question of whether the basic topological flow picture that has been developed in non-reacting flows remain, perhaps with some quantitative adjustments, or whether and when fundamentally new flow dynamics emerge. The second thrust will address flame stabilization processes. This focuses on elucidating the relative roles of flame propagation and autoignition on flame stabilization and spreading in high temperature crossflows. This work will utilize a suite of high frequency planar laser diagnostics at high frame rates. In addition, the research team will also leverage various on-campus programs to promote STEM education and outreach activities.

燃气涡轮机动力装置是陆基发电和吸气式飞机推进的主要推动者。这些发电厂由几个部件组成，其核心是燃烧器。在燃烧器中，需要空气和燃料的快速混合以有效地燃烧和冷却燃烧器部件。这一关键特征构成了射流横流配置的流体动力学益处的使用。在这种配置中，射流在垂直于交叉流的方向上注入，导致可以用于上述应用的复杂流体机械特性。因此，这个项目的广泛关注点是流体力学和横流配置中的射流燃烧的基础物理。了解这些物理是至关重要的下一代清洁和高效的燃气轮机的设计为美国航空航天和发电industries.The拟议工作的具体目标是提高横流反应射流的动力学的理解。横流中的射流是一个重要的基本问题，它包括高度应变流中的部分预混火焰传播、非预混火焰自燃、边缘火焰传播和反应流中的流体动力学稳定性。这是一个重要的正则问题，其中化学动力学和流体动力学的稳定性是紧密耦合的。该项目将侧重于两个主要方面。第一个推力将解决的拓扑结构和流体动力学的稳定性的影响的问题。特别是，它将解决的问题，是否基本的拓扑流的图片，已开发的非反应流仍然存在，也许与一些定量的调整，或是否和当从根本上新的流动动力学出现。第二个推力将解决火焰稳定过程。本文重点阐明火焰传播和自燃对高温横流中火焰稳定和传播的相对作用。这项工作将利用一套高频平面激光诊断在高帧速率。此外，研究团队还将利用各种校园计划来促进STEM教育和外展活动。

项目成果

Shear Layer Dynamics in a Reacting Jet in Crossflow

横流反应射流中的剪切层动力学

• DOI: 10.1016/j.proci.2018.06.031
• 发表时间: 2019
• 期刊: Proceedings of the Combustion Institute
• 影响因子: 3.4
• 作者: Nair, Vedanth;Wilde, Benjamin;Emerson, Benjamin;Lieuwen, Tim
• 通讯作者: Lieuwen, Tim

Forced response of laminar non-premixed jet flames

• DOI: 10.1016/j.pecs.2018.08.001
• 发表时间: 2019-01
• 期刊: Progress in Energy and Combustion Science
• 影响因子: 29.5
• 作者: Nicholas Magina;V. Acharya;T. Lieuwen

Counter rotating vortex pair structure in a reacting jet in crossflow

横流反应射流中的反向旋转涡对结构

• DOI: 10.1016/j.proci.2018.06.059
• 发表时间: 2019
• 期刊: Proceedings of the Combustion Institute
• 影响因子: 3.4
• 作者: Nair, Vedanth;Sirignano, Matthew;Emerson, Benjamin;Halls, Ben;Jiang, Naibo;Felver, Josef;Roy, Sukesh;Gord, Jim;Lieuwen, Tim
• 通讯作者: Lieuwen, Tim