Non-sinusoidal forms of effective angle of attack variation and multiple vortex formations for a pitching and plunging airfoil

Idil Fenercioglu, Oksan Cetiner

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Non-sinusoidal form of the effective angle of attack variation for a pitching and plunging airfoil is investigated using the Digital Particle Image Velocimetry (DPIV) technique to observe multiple vortex formation which degrades performance significantly in regimes of high thrust. A detailed categorization of separated vortex structures from the leading and trailing edges of a SD7003 airfoil was already performed in the Strouhal number range of 0.4 ≤ St ≤ 0.8 where sinusoidal forms of the effective angle of attack variation was observed. It is concluded that the Strouhal number is not the only parameter for the non-sinusoidal form of the effective angle of attack variation and there exists a threshold for the maximum effective angle of attack value, below where additional components at higher frequency appear. In this study, the occurrence of multiple vortex formations caused by non-sinusoidal form of effective angle of attack variation is investigated based on the classification of flow structure categories at a low Reynolds number range which is typical of small birds and potential MAVs.

Original languageEnglish
Title of host publication51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624101816
DOIs
Publication statusPublished - 2013
Event51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013 - Grapevine, TX, United States
Duration: 7 Jan 201310 Jan 2013

Publication series

Name51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013

Conference

Conference51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
Country/TerritoryUnited States
CityGrapevine, TX
Period7/01/1310/01/13

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