EAGER: Collaborative Research: Laminar Flow Inlet and Inertia Navigation System Innovation for the NSF/NCAR G-V Aircraft

EAGER项目支持为NSF/NCAR G-V飞机开发新的进气道，这将提高科学家测量大气中环境离子、可冷凝蒸汽和短寿命活性物质的能力。这些类型的化合物通常以非常低的水平存在于大气中，具有高度反应性，并且通常在第一次与表面接触时损失。因此，抽样成为衡量的一个关键因素。新的进气道将成为G-V飞机空气采样的重要社区资源。社会将受益于预测温室气体汇、气溶胶源及其对空气质量和气候影响的改进工具。这项工作包括设计、建造和基于计算流体动力学模拟的评估的早期阶段，以及层流入口的联邦航空管理局认证，该层流入口是可冷凝蒸汽和环境离子定量取样的先决条件;并探讨了利用差分GPS实现进气道惯性导航系统自主启动的可行性，开放大气中自由基物种的自由遥感探测。目前，G-V飞机上的认证进气道使用湍流空气流状态，该状态会受到壁损失的影响，并且适合于对寿命较长的物种进行采样。自主遥感和层流进气道设计将能够对目前可用的进气道设计无法实现的大量有机和无机自由基和短寿命物种进行采样。新的入口将提供填补我们对氧化能力理解的空白的潜力，以及那些增加纳米颗粒早期生长的可冷凝蒸汽。这项研究包括两名研究生和一名博士后学者的参与，虽然这项EAGER提案是探索性的，是一项高风险、高回报的努力参与该计划的科学家们的丰富经验和他们现有的分析能力，既降低了风险，又减少了所需的投资。该奖项反映了美国国家科学基金会的法定使命，并通过利用基金会的智力价值进行评估，被认为是值得支持的和更广泛的影响审查标准。

This EAGER project supports the development of a new inlet for the NSF/NCAR G-V aircraft that will enhance the ability of scientists to measure ambient ions, condensable vapors, and short-lived reactive species in the atmosphere. These types of compounds typically exist in the atmosphere at very low levels, are highly reactive, and are typically lost upon first contact with a surface. Therefore, sampling becomes a critical factor in their measurement. The new inlet will become an important community resource for air sampling from the G-V aircraft. Society will benefit from the improved tools for predicting the sinks of greenhouse gases, the sources of aerosols, and the impact of these on air quality and climate. This effort includes the early stages of the design, construction, and assessment based on computational fluid dynamics simulations, and the Federal Aviation Authority certification of a laminar flow inlet that is pre-requisite for quantitative sampling of condensable vapors and ambient ions; and this effort also explores the feasibility for autonomous startup of an inertia navigation system using differential GPS for inlet-free remote sensing detection of radical species in the open atmosphere. Currently, certified inlets on the G-V aircraft use turbulent air flow regimes that are subject to wall losses, and suitable for the sampling of longer lived species. The autonomous remote-sensing and laminar inlet design will enable the sampling of a multitude of organic and inorganic radical and short lived species not possible with the currently available inlet designs. The new inlet will provide the potential to fill gaps in our understanding of oxidative capacity, and those condensable vapors that add to the early growth of nanoparticles. This research includes the participation of two graduate students and a postdoctoral scholar.Although this EAGER proposal is exploratory and is a high-risk, high-reward effort, the extensive experience of the participating scientists and their existing analytical capabilities reduce both the risk and the required investment.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.