A NEW OPTICAL TECHNIQUE FOR PROBING CLEAR AIR TURBULENCE

Simple item page
dc.contributor.advisorDavis, Christopher C.en_US
dc.contributor.authorHarris, Joseph Danielen_US
dc.contributor.departmentPhysicsen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2011-07-06T05:38:18Z
dc.date.available2011-07-06T05:38:18Z
dc.date.issued2010en_US
dc.description.abstractA new optical technique for probing the small scales turbulence has been developed. When light is transmitted through the atmosphere, it can scatter off vortex filaments in the air that are at different densities from the surrounding air, and hence, have different indices of refraction. These filaments, or eddies are distributed through a turbulent flow. Our experiment illuminated a turbulent flow with an expanded Gaussian laser beam. Two detectors, capable of translation perpendicular to the beam path, observed intensity fluctuations at different points. By analysis of two point spatial transmission correlation functions, the smallest length scales of clear air turbulence can be determined in real time without disturbing the flow. By changing the type of air flow, different length scales associated with different conditions have been measured optically. The measured scales agree with measurements done by hotwire techniques and correspond to the Kolmogorov microscale.en_US
dc.identifier.urihttp://hdl.handle.net/1903/11461
dc.subject.pqcontrolledPhysicsen_US
dc.subject.pqcontrolledOpticsen_US
dc.subject.pquncontrolledAnenometeren_US
dc.subject.pquncontrolledCorrelationen_US
dc.subject.pquncontrolledHotwireen_US
dc.subject.pquncontrolledMicroscaleen_US
dc.subject.pquncontrolledOpticalen_US
dc.subject.pquncontrolledTurbulenceen_US
dc.titleA NEW OPTICAL TECHNIQUE FOR PROBING CLEAR AIR TURBULENCEen_US
dc.typeDissertationen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Harris_umd_0117E_11928.pdf
Size:
979.03 KB
Format:
Adobe Portable Document Format
Download

Collections

UMD Theses and Dissertations
Physics Theses and Dissertations