EAGER: Development of prompt molecular tagging velocimetry and thermometry

EAGER：快速分子标记测速和测温技术的发展

• 批准号: 2234149
• 负责人: Philippe Bardet
• 金额: $ 22万
• 依托单位: George Washington University
• 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: 2022-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2234149&HistoricalAwards=false
• 关键词: EAGER; Development; prompt; molecular; tagging

This project aims to take advantage of the latest developments in laser diagnostics to develop a new scheme to measure heat transfers in complex flows at an unprecedented resolution. This will represent the first demonstration of the direct measurement of turbulent flow combined with temperature. The new technique will provide a tool to shed insights into this important phenomenon and will lead to the development of new models to improve the operation of many processes. For example, the ability of a fluid to transport heat away from hot surfaces directly affects the efficiency of many systems (e.g., solar panels, nuclear reactors, computer chips, electric car batteries) or affect the drag of moving bodies (e.g., naval ships, airplanes, automobiles).The main objective of the proposed work is to take advantage of the latest developments in the design of molecular tagging velocimetry (MTV) to further expand MTV to thermometry with the ability to achieve time-resolved and spatially distributed sensing of heat fluxes in turbulent boundary layers. The research will take advantage of the spectroscopic nature of MTV to select dye and measurement schemes that enable the resolution of the temperature field, instead of an inert dye. The addition of thermometry to the MTV scheme will enable for the first time to measure temperature and velocity fields in an instantaneous manner and at the smallest scales of relevance for many industrial flows. The project will demonstrate the technique in a locally heated turbulent channel flow.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.

该项目旨在利用激光诊断的最新发展，开发一种新方案，以前所未有的分辨率测量复杂流中的传热。 这将是湍流与温度相结合的直接测量的首次演示。这项新技术将提供一种工具来深入了解这一重要现象，并将导致新模型的开发，以改善许多流程的运行。 例如，流体从热表面传输热量的能力直接影响许多系统（例如太阳能电池板、核反应堆、计算机芯片、电动汽车电池）的效率或影响移动物体（例如海军舰艇）的阻力、飞机、汽车）。所提出的工作的主要目标是利用分子标记测速（MTV）设计的最新进展，将MTV进一步扩展到测温，并能够实现时间分辨和空间分辨湍流边界层中热通量的分布式传感。 该研究将利用 MTV 的光谱性质来选择能够解析温度场的染料和测量方案，而不是惰性染料。 MTV 方案中添加测温技术将首次能够以瞬时方式并以与许多工业流程相关的最小尺度测量温度和速度场。该项目将在局部加热的湍流通道流中演示该技术。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。