CAREER: From Flamelet to Full-Scale: Advancing Plasma-Assisted Combustion for Low-Emission Sustainable Fuels

职业生涯：从小火焰到全面：推进低排放可持续燃料的等离子体辅助燃烧

• 批准号: 2339518
• 负责人: Carmen Guerra-Garcia
• 金额: $ 56.03万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-02-01 至 2029-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2339518&HistoricalAwards=false
• 关键词: CAREER; Flamelet; Full; Scale; Advancing

Addressing climate change necessitates innovative solutions to reduce CO2 and other pollutants from combustion-based energy production and transportation, including aviation. This project targets advancing plasma-assisted combustion (PAC) technology, focusing on enhancing lean-flame stability and reducing pollutants in real-world scenarios. Current understanding of PAC, including its impact on emissions and its scalability, is incomplete. Prior work has demonstrated that nanosecond repetitively pulsed plasmas can extend the lean blowout limit of hydrocarbon and ammonia flames and mitigate instabilities. However, the impact on NOx emissions remains unclear, especially considering the competing effects of lean-burning and emission production by the plasma itself. A significant gap exists between fundamental chemical kinetic studies and practical applications, with research on industry-relevant platforms often resorting to trial-and-error approaches. This project aims to bridge this divide, connecting knowledge from 1D laminar systems to industrial parameters, including lean blowout limit, combustion dynamics onset, and emissions. The goal of the project is to deepen our understanding of plasma-assisted lean flame stabilization and NOx production and apply this knowledge to CO2-free fuels, including hydrogen and ammonia. More specifically the project will evaluate the hypothesis that the efficacy of plasma strategies for ensuring the static and dynamic stability of turbulent flames is intrinsically linked to the impact of plasma on fundamental flame parameters, such as the laminar flame speed and the extinction strain rate. The project will develop numerical models for plasma-assisted flamelets, and correlate experimental data on lean blowout extension and suppression of combustion dynamics of plasma-actuated swirl-stabilized burners to fundamental flame parameters, for a range of fuels (NH3, H2 and CH4 blends) and operational conditions. The second goal focuses on optimizing NOx emissions in these systems. Rather than simply extending the lean blow-out limit, the project proposes direct emissions optimization, using the 1D flamelet platforms. A parametric exploration will identify optimal regions for emissions reduction using plasma. A third goal complements the 1D picture by considering higher-dimensional effects. The project integrates an education and broadening participation plan, leveraging internal programs at the department and institute level at MIT. The focus is on developing digital educational content for an undergraduate course on Aerospace Propulsion and providing research opportunities for undergraduate students.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.

解决气候变化需要创新的解决方案，以减少基于燃烧的能源生产和运输（包括航空）的二氧化碳和其他污染物。该项目的目标是推进等离子辅助燃烧（PAC）技术，重点是增强型稳定性和减少现实情况下的污染物。当前对PAC的理解，包括对排放的影响及其可伸缩性，这是不完整的。先前的工作表明，纳秒重复的脉冲等离子体可以扩展碳氢化合物和氨明的瘦井喷极限，并减轻不稳定性。但是，对NOX排放的影响尚不清楚，尤其是考虑到血浆本身瘦肉和排放产生的竞争影响。基本化学动力学研究与实际应用之间存在一个很大的差距，对与行业相关的平台的研究通常诉诸于试验。该项目旨在弥合这种鸿沟，将知识从1D层流系统连接到工业参数，包括精益井喷限制，燃烧动力学发作和排放。该项目的目的是加深我们对等离子体辅助的瘦火焰稳定和NOX生产的理解，并将这些知识应用于包括二氢和氨气在内的无二氧化碳燃料。更具体地说，该项目将评估以下假设：等离子体策略确保湍流火焰的静态和动态稳定性的疗效与等离子体对基本火焰参数的影响（例如层状火焰速度速度和灭绝应变率）本质上相关。该项目将开发用于等离子体辅助的燃料组的数值模型，并将实验数据相关联，以倾斜井喷扩展以及抑制等离子旋转稳定的燃烧器的燃烧动力学与基本火焰参数的燃烧动力学，用于一系列燃料（NH3，H2和CH4闪烁）和操作条件。第二个目标重点是优化这些系统中的NOX排放。该项目不简单地扩大瘦吹式限制，而是使用1D火焰平台提出了直接的排放优化。参数探索将确定使用血浆减少排放的最佳区域。第三个目标通过考虑更高维度的效果来补充1D图片。该项目整合了教育和扩大参与计划，并利用了麻省理工学院的部门和研究所的内部计划。重点是开发数字教育内容，为航空推进的本科课程开发，并为本科生提供研究机会。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和更广泛影响的评估评估来获得支持的。