CaltechAUTHORS
  A Caltech Library Service

Turbulence Amplitude Modulation in an Externally Forced, Subsonic Turbulent Boundary Layer

Ranande, Piyush and Duvvuri, Subrahmanyam and McKeon, Beverley and Gordeyev, Stanislav and Christensen, Kenneth and Jumper, Eric (2016) Turbulence Amplitude Modulation in an Externally Forced, Subsonic Turbulent Boundary Layer. In: 54th AIAA Aerospace Sciences Meeting, January 4-8, 2016, San Diego, CA. http://resolver.caltech.edu/CaltechAUTHORS:20160212-132731202

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20160212-132731202

Abstract

This paper describes an experiment in which a forced shear layer external to a turbulent boundary layer is used to impart external large-scale forcing to the boundary layer. The shear-layer forcing creates periodic coherent vortical structures in the shear layer that convect at the shear-layer convective velocity. The convecting coherent structures create a concomitant unsteady pressure field that provides a disturbance for the turbulent boundary layer on the upper wall of the tunnel above the forced shear layer. The unsteady pressure field in turn creates a variation of the effective freestream velocity experienced by the boundary layer, and both the pressure disturbance and the concomitant velocity fluctuations are reported. The character of the turbulence in the boundary layer due to the external forcing is studied through hot-wire anemometry. Thorough examination of the turbulence results in similarities between the turbulence amplitude modulation results due to these externally-forced experiments and modulation response of an internally-forced boundary layer done by others.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.2514/6.2016-1120DOIArticle
http://arc.aiaa.org/doi/abs/10.2514/6.2016-1120PublisherArticle
ORCID:
AuthorORCID
Duvvuri, Subrahmanyam0000-0001-8082-1658
McKeon, Beverley0000-0003-4220-1583
Additional Information:© 2016 AIAA. This effort were funded in part by the High Energy Laser - Joint Technology Office (HEL-JTO) and administered through the Air Force Office for Scientific Research (AFOSR) under Grant Number FA9550-13-1-0001. The U.S. Government is authorized to reproduce and distribute reprints for governmental purposes notwithstanding any copyright notation thereon.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-13-1-0001
Record Number:CaltechAUTHORS:20160212-132731202
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160212-132731202
Official Citation:Piyush M. Ranade, Subrahmanyam Duvvuri, Beverley J. McKeon, Stanislav Gordeyev, Kenneth T. Christensen, and Eric J. Jumper. "Turbulence Amplitude Modulation in an Externally Forced, Subsonic Turbulent Boundary Layer", 54th AIAA Aerospace Sciences Meeting, AIAA SciTech, (AIAA 2016-1120). http://dx.doi.org/10.2514/6.2016-1120
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64480
Collection:CaltechAUTHORS
Deposited By: Jamie Sei
Deposited On:18 Feb 2016 23:49
Last Modified:21 Sep 2016 22:21

Repository Staff Only: item control page