ERI: High-pressure spectroscopy of ammonia combustion species for carbon-free supercritical and detonative power and propulsion

ERI：用于无碳超临界和爆轰动力和推进的氨燃烧物质的高压光谱

• 批准号: 2135789
• 负责人: Daniel Pineda
• 金额: $ 20万
• 依托单位: University of Texas at San Antonio
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-15 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2135789&HistoricalAwards=false
• 关键词: ERI; pressure; spectroscopy; ammonia; combustion

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). More efficient energy conversion at extreme pressures is increasingly important as both the U.S. transportation and power generation sectors transition to a low-carbon future to reduce environmental impact and increase U.S. energy security. Unfortunately, extreme-pressure combustion of carbon-free fuels, such as ammonia, is not well-understood. The main goal of this project is to better understand chemical reactions of high-pressure ammonia by measuring important combustion gases formed during controlled ignition experiments, and at fast enough measurement rates to capture the behavior of many short-lived gases. To perform these measurements, a new laser diagnostic technique will be developed to measure these gases at higher pressures and faster measurement rates than ever before. Successful execution of the project will provide (1) new diagnostic tools for measuring ammonia combustion gases at extreme pressures, with broader application to both energy and rocket propulsion systems, and (2) new understanding of pollution formation at high temperatures and pressures. It is envisioned that knowledge gained from this project will help accelerate development of carbon-free power generation technologies in the U.S. The project will also build state-of-the-art combustion research capability at UTSA, a Minority Serving Institution with close proximity to U.S. energy and aerospace industries, and complementary educational activities will enhance UTSA’s emerging aerospace curriculum with relevant laboratory research projects. The research objective of this proposal is to exploit non-ideal spectroscopic phenomena for measurement of supercritical and detonation combustion flows of next-generation carbon-free fuels, most specifically ammonia. The proposed research combines advancements in low-cost compact mid-infrared photonics with physics-informed spectroscopic models to quantitatively interpret otherwise convoluted high-pressure absorbance spectra at measurement rates which sufficiently capture time-evolution of intermediate species in supercritical and detonation regimes. In this project, high-pressure absorption spectroscopy of ammonia combustion gases will be investigated using both a heated optical gas cell and high-enthalpy shock tube. Thermodynamically scalable models will be developed to predict absorbance spectra of these species for temperatures and pressures relevant to detonation and supercritical combustion. The models will subsequently be used to perform novel high-speed quantitative measurements of the target species during supercritical ignition and detonation combustion of ammonia mixtures in shock and detonation tubes at UTSA. Data collected during the project effort will be incorporated into graduate and undergraduate engineering courses at UTSA to better prepare students for next-generation research and development in the engineering workforce.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.

该奖项是根据2021年《美国救援计划法》（公法117-2）全部或部分资助的。由于美国运输和发电部门向低碳未来过渡，以减少环境影响并提高美国能源安全，因此在极端压力下更有效的能源转化越来越重要。不幸的是，无碳燃料（例如氨）的极端压力组合并不理解。该项目的主要目标是通过测量在受控点火实验中形成的重要组合气体，并以足够快的测量速率来捕获许多短寿命气体的行为，以更好地了解高压氨的化学反应。为了执行这些测量，将开发一种新的激光诊断技术，以比以往任何时候都以更高的压力测量这些气体和更快的测量速率。该项目的成功执行将提供（1）新的诊断工具，用于在极端压力下测量氨复合气体，并在能量和火箭推进系统上更广泛地应用，以及（2）在高温和压力下对污染形成的新理解。 It is envisioned that knowledge gained from this project will help accelerate development of carbon-free power generation technologies in the U.S. The project will also build state-of-the-art composite research capability at UTSA, a Minority Serving Institution with close proximity to U.S. energy and aerospace industries, and complementary educational activities will enhance UTSA’s emerging aerospace curriculum with relevant laboratory research projects.该提案的研究目标是利用非理想的光谱现象来测量下一代无碳燃料（最特别是氨）的超临界和爆炸混合物流量。拟议的研究结合了低成本紧凑的中红外光子学与物理学的光谱模型的进步，以定量解释其他令人费解的高压吸光度光谱，以测量速率充分地捕获超临界和蒸发方案中中间物种的时间进化。在这个项目中，将使用加热的光气电池和高触觉冲击管研究氨组合气体的高压抽象光谱。将开发热力学可扩展模型，以预测这些物种的吸收光谱，以使其与爆炸和超临界混合物有关的温度和压力。这些模型随后将用于在UTSA的超临界点火和爆炸混合物中对目标物种进行新的高速定量测量。在项目工作期间收集的数据将纳入UTSA的研究生和本科工程课程中，以更好地为学生提供工程劳动力的下一代研究和发展的准备。该奖项反映了NSF的法定任务，并被认为是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通过评估来支持的。

项目成果

Mid-infrared N2O absorption sensor for high-enthalpy flows relevant to hypersonic ground testing

用于高超声速地面测试相关高焓流的中红外 N2O 吸收传感器

• DOI: 10.2514/6.2024-2496
• 发表时间: 2024
• 期刊: American Institute of Aeronautics and Astronautics
• 作者: Steavenson, Benjamin;Munera, Laura;Crumley, Tristan Z.;Guerra, Denise Y.;Corral-Martinez, Krystal;Pineda, Daniel I.
• 通讯作者: Pineda, Daniel I.