Publication:
Unsteady flow field measurements using LDV.

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Authors
Hedrick, Steven D.
Subjects
laser Doppler velocimetry
schlieren flow visualization
dynamic stall
Advisors
Bodapati, Satyanarayana
Date of Issue
1987-12
Date
December 1987
Publisher
Language
en_US
Abstract
The primary goal of this thesis was the development of an experimental technique, and supporting software, for the acquisition and analysis of unsteady velocity data generated by an oscillating airfoil. This research was in support of a major investigation of the compressibility effects on dynamic stall . The experimental procedure involved schlieren flow visualization for comparison of steady and unsteady flow fields, and for determination of parameters for further study. Laser Doppler velocimetry was employed for obtaining velocity data in the airfoil wake. For unsteady data, the airfoil was oscillated in pitch about its quarter chord. The data analysis produced wake profile plots representing the flow field disturbed by the airfoil. Results were obtained for steady and unsteady conditions.
Type
Thesis
Description
Series/Report No
Department
Aeronautical Engineering
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
72 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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