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.

Agency
National Science Foundation (NSF)
Institute
Division of Atmospheric and Geospace Sciences (AGS)
Type
Standard Grant (Standard)
Application #
9113513
Program Officer
Anne-Marie Schmoltner
Project Start
Project End
Budget Start
1992-09-15
Budget End
1996-02-29
Support Year
Fiscal Year
1991
Total Cost
$174,000
Indirect Cost
Name
University of Colorado at Boulder
Department
Type
DUNS #
City
Boulder
State
CO
Country
United States
Zip Code
80309