EAGER: Enhancement of Ammonia combustion by spatiotemporal control of plasma kinetics

EAGER：通过等离子体动力学的时空控制增强氨燃烧

• 批准号: 2337461
• 负责人: Shirshak Dhali
• 金额: $ 20万
• 依托单位: Old Dominion University Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2025-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2337461&HistoricalAwards=false
• 关键词: EAGER; Enhancement; Ammonia; combustion; spatiotemporal

Due to the release of greenhouse gases from combustion of hydrocarbons, fuels such as ammonia and hydrogen are of interest as an alternative source of energy. Utilizing pure hydrogen as an energy carrier is limited by expensive storage and transportation technologies in addition to having a low volumetric energy in comparison to hydrocarbons. Ammonia on the other hand is attractive as a carbon-free high-density hydrogen energy source. However, ammonia as a direct fuel has several shortcomings including low burning velocity, narrow flammability limits, and high nitrogen oxides emissions. It has been shown that nonthermal plasmas have the potential to control ignition/combustion characteristics of fuels. Most research to date has been incremental with plasma sources borrowed from other applications which are not suitable for combustion and realistic engineering constraints make them impractical. The aim of this project is to study the combustion characteristics of ammonia with a novel plasma source. Considering that nearly 80% of the current worldwide energy consumption comes from burning fossil fuels, this will have a significant impact on the environment and reduction in the consumption of fossil fuels. The research will contribute to the professional development and training of graduate and undergraduate students in the critical area of plasma-assisted combustion science.The goal of the proposed research is to investigate a plasma source created by a rotating electric field to control ignition and combustion kinetics of ammonia. The plasma source conforms to the combustor geometry and efficiently produces the precursors needed to control the combustion characteristics of ammonia. The proposed method is the only known method of controlling the spatial distribution of electric field in real time resulting in volumetric electrical energy coupling and production by electron impact of radicals. The project will lead to a better understanding of the mechanism of plasma-assisted combustion and the effect of controlled release of electrical energy on the flame velocity and LBO range. This will lead to the development of predictive tools for design of plasma-assisted ignition/combustion systems. Unlike other techniques under investigation, this has a better chance of being implemented in actual devices due to its conformity to the combustion geometry and simplicity. This investigation will also inform the development of advanced engines concepts including hypersonic transportation. The work proposed will advance the knowledge of plasma assisted combustion to stabilize ignition and combustion at high altitudes and at low dynamic pressures and temperatures.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

由于碳氢化合物的燃烧释放了温室气体，因此氨和氢等燃料是一种替代能源。除了与碳氢化合物相比，使用昂贵的存储和运输技术，利用纯氢作为能量载体受到限制。另一方面，氨是无碳的高密度氢能源的吸引力。但是，作为直接燃料的氨的氨缺陷，包括低燃烧速度，狭窄的易燃性限制和高氮氧化物的排放。已经表明，非热等离子体具有控制燃料的点火/燃烧特性的潜力。迄今为止，大多数研究都是从其他应用程序中借来的等离子来源逐渐增长的，这些应用程序不适合燃烧和现实的工程限制，这使它们变得不切实际。 该项目的目的是研究氨的燃烧特性，并具有新颖的血浆来源。考虑到当前近80％的全球能源消耗来自燃烧化石燃料，这将对环境和减少化石燃料的消费产生重大影响。 这项研究将有助于血浆辅助燃烧科学关键领域的研究生和本科生的专业发展和培训。拟议的研究的目的是研究由旋转电场创建的等离子体来源，以控制ammonia的点火和燃烧动力学。血浆源符合燃烧器的几何形状，并有效地产生控制氨燃烧特性所需的前体。所提出的方法是实时控制电场空间分布的唯一已知方法，从而导致了自由基的电子影响，从而导致了体积的电能耦合和产生。 该项目将更好地理解血浆辅助燃烧机理，以及电能释放对火焰速度和LBO范围的影响。这将导致开发用于设计等离子辅助点火/燃烧系统的预测工具。与正在研究的其他技术不同，由于燃烧几何形状和简单性，因此在实际设备中有更大的机会在实际设备中实施。这项调查还将为包括高超音速运输在内的高级发动机概念的发展提供信息。提出的工作将提高血浆辅助燃烧的知识，以稳定高空和低动态压力和温度下的点火和燃烧。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。