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.

由于碳氢化合物燃烧释放温室气体，氨和氢等燃料作为替代能源受到关注。利用纯氢作为能量载体除了与烃相比具有低体积能量之外还受到昂贵的储存和运输技术的限制。另一方面，氨作为无碳高密度氢能源是有吸引力的。然而，氨作为直接燃料具有几个缺点，包括低燃烧速度、窄可燃极限和高氮氧化物排放。它已被证明，非热等离子体有可能控制点火/燃烧特性的燃料。迄今为止，大多数研究都是从其他应用中借用的等离子体源，这些应用不适合燃烧，现实的工程限制使它们不切实际。 本计画的目的是利用一种新颖的电浆源来研究氨的燃烧特性。考虑到目前全球近80%的能源消耗来自化石燃料的燃烧，这将对环境和减少化石燃料的消耗产生重大影响。 该研究将有助于研究生和本科生在等离子体辅助燃烧science. The的关键领域的专业发展和培训的目标，拟议的研究是调查等离子体源产生的旋转电场来控制点火和燃烧动力学的氨。等离子体源符合燃烧室的几何形状，并有效地产生控制氨的燃烧特性所需的前体。所提出的方法是唯一已知的方法控制电场的空间分布在真实的时间导致体积电能耦合和生产的电子碰撞的自由基。 该项目将导致更好地理解等离子体辅助燃烧的机理以及控制释放电能对火焰速度和LBO范围的影响。这将导致等离子体辅助点火/燃烧系统设计的预测工具的发展。与正在研究的其他技术不同，由于其符合燃烧几何形状和简单性，这具有在实际设备中实施的更好机会。这项研究还将为包括高超音速运输在内的先进发动机概念的发展提供信息。这项工作将促进等离子体辅助燃烧的知识，以稳定点火和燃烧在高海拔和低动态压力和temperature.This奖项反映了NSF的法定使命，并已被认为是值得的支持，通过评估使用基金会的智力价值和更广泛的影响审查标准。