Effects of upstream body on pitching trapezoidal panel

Seth A. Brooks, Melissa A. Green

Research output: Chapter in Book/Report/Conference proceedingConference contribution


To understand the effects of an upstream body on the wake characteristics of an oscillating propulsor, volumetric reconstructions of phase-averaged velocity field measurements were collected and analyzed. Two experiments were conducted and their results were compared using using qualitative wake characterization. Both datasets had a pitching frequency of 1 Hz, a maximum pitching angle of ±15, and a resulting Strouhal number of 0.37. The Strouhal number was selected for comparison with existing data from a similar experiment. In the previous experiment, an isolated, rigid, trapezoidal panel was pitched about its leading edge. The current work uses the same panel and motion as the first with the addition of an upstream, stationary idealized fish-like body. Together these datasets suggest that a stationary, upstream body does not significantly affect the large-scale wake deformation phenomena, including transverse expansion and spanwise compression. The addition of the upstream body did affect the presence of small-scale structures that are present in the isolated panel case but not in the upstream body case. It is also shown that the upstream body potentially reduces the net thrust produced by the system.

Original languageEnglish (US)
Title of host publicationAIAA Aviation 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages9
ISBN (Print)9781624105890
StatePublished - 2019
Externally publishedYes
EventAIAA Aviation 2019 Forum - Dallas, United States
Duration: Jun 17 2019Jun 21 2019

Publication series

NameAIAA Aviation 2019 Forum


ConferenceAIAA Aviation 2019 Forum
Country/TerritoryUnited States

Bibliographical note

Funding Information:
This work was supported by the Office of Naval Research under ONR Award No. N00014-17-1-2759. The authors also wish to thank the Syracuse Center of Excellence for Environmental and Energy Systems for providing funds used towards the purchase of lasers and related equipment. Images were created using FieldView as provided by Intelligent Light through its University Partners Program.

Publisher Copyright:
© 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.


Dive into the research topics of 'Effects of upstream body on pitching trapezoidal panel'. Together they form a unique fingerprint.

Cite this