Fundamental investigation of the flow around a finite span low aspect ratio pin and its application to flow control
Authors
Gildersleeve, Samantha M.
ORCID
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Other Contributors
Amitay, Michael
Oberai, Assad
Sahni, Onkar
Letchford, C. W.
Oberai, Assad
Sahni, Onkar
Letchford, C. W.
Issue Date
2018-12
Keywords
Mechanical engineering
Degree
PhD
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
Full Citation
Abstract
A separate study was conducted to evaluate the global impacts from the low aspect ratio pins over a deflected control surface of a NACA 0012 airfoil as a potential means of separation control using SPIV and surface pressure measurements. An array of pins, fully submerged within a turbulent flow, and placed upstream of a strong adverse pressure gradient and severely separated flow, demonstrated significant reduction in separation and total drag, while increasing the global circulation (i.e., lift). Most notably, the influences from a single static pin were compared to that of a dynamic pin and results indicated an ability to lock on and amplify the shedding frequency associated with the wake of the airfoil. These results provide further evidence of the potential uses for low aspect ratio pins (static or dynamic) as effective devices for a wide-range of applications, and more specifically, for separation control.
Description
December 2018
School of Engineering
School of Engineering
Department
Dept. of Mechanical, Aerospace, and Nuclear Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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