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Phase relationships between velocity, wall pressure, and wall shear stress in a forced turbulent boundary layer

Rosenberg, Kevin and Duvvuri, Subrahmanyam and Luhar, Mitul and McKeon, Beverley J. and Barnard, Casey and Freidkes, Brett and Meloy, Jessica and Sheplak, Mark (2016) Phase relationships between velocity, wall pressure, and wall shear stress in a forced turbulent boundary layer. In: 46th AIAA Fluid Dynamics Conference. AIAA , Reston, VA. http://resolver.caltech.edu/CaltechAUTHORS:20161128-143308353

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Abstract

A large scale spatio-temporally periodic disturbance was excited in a turbulent boundary layer via a wall-actuated dynamic roughness. Streamwise velocity, wall pressure, and direct wall shear stress measurements were made with a hot wire, pressure microphone, and a micro-scale differential capacitive sensor, respectively. Phase-averaged fields for the three quantities were calculated and analyzed. A phase calibration between the various sensors was performed with an acoustic plane wave tube over a range of operating conditions to validate a direct phase comparison between the respective quantities. Results suggest encouraging agreement between the phase of the wall shear stress and velocity near the wall; however, more refined velocity measurements are needed to make quantitative comparisons to the wall pressure. Overall, this work highlights the potential for wall-based control with applications towards reducing turbulent drag.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.2514/6.2016-4396DOIArticle
http://arc.aiaa.org/doi/10.2514/6.2016-4396PublisherArticle
ORCID:
AuthorORCID
Duvvuri, Subrahmanyam0000-0001-8082-1658
McKeon, Beverley J.0000-0003-4220-1583
Additional Information:© 2016 AIAA. The support of AFOSR (grant FA 9550-12-1-0469, program manager D. Smith) is gratefully acknowledged.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA 9550-12-1-0469
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2016-4396
Record Number:CaltechAUTHORS:20161128-143308353
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20161128-143308353
Official Citation:Kevin T. Rosenberg, Subrahmanyam Duvvuri, Mitul Luhar, Beverley J. McKeon, Casey Barnard, Brett Freidkes, Jessica Meloy, and Mark Sheplak. "Phase relationships between velocity, wall pressure, and wall shear stress in a forced turbulent boundary layer", 46th AIAA Fluid Dynamics Conference, AIAA AVIATION Forum, (AIAA 2016-4396) http://dx.doi.org/10.2514/6.2016-4396
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72332
Collection:CaltechAUTHORS
Deposited By: Jamie Sei
Deposited On:28 Nov 2016 23:08
Last Modified:28 Nov 2017 17:55

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