Geometrically-exact extension of theodorsen’s frequency response model

Haithem E. Taha, Zhimiao Yan, Muhammad R. Hajj

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

1 Scopus citations

Abstract

The classical unsteady theory of Theodorsen is revisited relaxing some of the major assumptions such as (1) flat wake, (2) small angle of attack, (3) small disturbances to the mean flow components, and (4) time-invariant free-stream. A semi-analytical, geometrically- exact, unsteady potential flow model is developed for airfoils undergoing large amplitude maneuvers. The numerical implementation of the developed model is presented. The unsteady predictions of the developed model are validated against experimental and computational results. Then, the frequency response of the flow dynamics is determined at different angles of attack. While good agreement is shown with Theodorsen’s function at small angle of attack, considerable qualitative and quantitative discrepancies between the obtained frequency response at large angles of attack and Theodorsen’s function are observed.

Original languageEnglish
Title of host publication53rd AIAA Aerospace Sciences Meeting
DOIs
StatePublished - 2015
Event53rd AIAA Aerospace Sciences Meeting, 2015 - Kissimmee, United States
Duration: 5 Jan 20159 Jan 2015

Publication series

Name53rd AIAA Aerospace Sciences Meeting

Conference

Conference53rd AIAA Aerospace Sciences Meeting, 2015
Country/TerritoryUnited States
CityKissimmee
Period5/01/159/01/15

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