Development and Testing of an Efficient, Isokinetic, High- Volume Aerosol Filter Collection System for Use on Aircraft

这是一个项目，设计，制造和测试两个新的概念 用于飞行器的气溶胶入口，作为现有技术的一部分， 机载气溶胶采样系统。 的主要区别 在这些新型进气道和常用的常规等速进气道之间， 进气道是主动壁过滤的发展和使用。 的 入口的“活动”壁完全覆盖有成形的 过滤基质和颗粒撞击这些覆盖的墙壁 应该很容易和有效地捕获。 湍流沉积 喷嘴由非层流、高气流 速度和不对准的流动流线， 被认为是这些进气道的主要问题。 事实上，墙 过滤可以证明是气溶胶捕获的优选方法。 提出了一系列风洞和飞机实验， 回答这个问题和其他问题。 因此，气溶胶“壁损失”， 早期的取样工作可能会成为过去。 这些进气道是一个新的飞机采样系统的主要部分 我们正在发展中。 申请资金来自NSF 仅用于进水口的设计、建造和测试;其他 已寻求并获得资金，用于开发 飞机取样系统的其余部分。

This is a project to design, fabricate and test two new-concept aerosol inlets for use on aircraft, as part of a state-of-the-art, aircraft based aerosol sampling system. The major difference between these new inlets and commonly-used conventional isokinetic inlets is the development and use of active wall filtration. The "active" walls of the inlets are completely covered with a shaped filter substrate, and particles which hit these covered walls should be easily and efficiently captured. Turbulent deposition in the nozzle resulting from non-laminar flow, high airstream velocities and misalignment with the flow streamlines is not considered a major problem with these inlets. In fact, wall filtration may prove to be the preferred method of aerosol capture. A series of wind tunnel and aircraft experiments are proposed to answer this and other questions. Thus, aerosol "wall losses" which plagued earlier sampling efforts may become a thing of the past. These inlets are a major portion of a new aircraft sampling system we are in the process of developing. Funding is requested from NSF only for the design, building and testing of the inlets; other funding has been sought and acquired for the development of the remaining portions of the aircraft sampling system.