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Document Type:Latin Dissertation
Language of Document:English
Record Number:52890
Doc. No:TL22844
Call number:‭EP25406‬
Main Entry:Paul F. Medina
Title & Author:Experimental study of a resonant fence actuator in a turbulent boundary layerPaul F. Medina
College:University of Wyoming
Date:2006
Degree:M.S.
student score:2006
Page No:144
Abstract:An experimental study was conducted to examine the characteristics of a resonant oscillating fence actuator in a flat-plate turbulent boundary layer. Experimental tests were conducted on static, transitioning, and oscillating fences at different heights and frequencies. As expected, the static fences produced spoiler-like effects, but the results differed significantly from earlier studies in laminar boundary layers. Transitioning fences demonstrated that flow separation can be established in time scales limited by the time necessary to deploy the fence into the flow. Oscillating fences produced significant large coherent structures in the flow in the form of advecting vortices. The peak suction at the plate surface associated with these disturbances scaled with the fence height while the net lift produced scaled with the Strouhal number. The resonant fence actuator shows strong potential for practical applications due to its flow control effectiveness, low power consumption, and overall simplicity in design. The device effectively creates energetic disturbances that scale with the flow and behave predictably based on non-dimensional parameters linking actuator and flow conditions.
Subject:Applied sciences; Mechanical engineering; 0548:Mechanical engineering
Added Entry:University of Wyoming