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An Assessment of 3-C PIV Analysis Methodology for HART II Measured Data

Lim, Joon W. and van der Wall, Berend G. (2010) An Assessment of 3-C PIV Analysis Methodology for HART II Measured Data. Other. NASA/TM-2010-216024; TR-RDMR-AF-10-03, 45 S.

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Abstract

Since the completion of the DNW test, HART II partners have put forth significant efforts to derive vortex properties from the measured data. These properties include vortex center, rotation angles of the vortex axis in the PIV measurement plane, maximum vorticity, core radius , and swirl velocity. Differences among the partners’ results were found for some of these vortex properties, which required more effort to assess the physical significance of the differences. This was because the derived vortex properties were an integral of all the sub-processes in the complex PIV data analysis procedure, and more information was needed to resolve the differences in vortex properties. The objectives of this report are to discuss and summarize the parameters and techniques that could contribute to these differences. The detailed comparisons in this report have helped establish a strong foundation for a PIV data analysis methodology in determining vortex properties.

Item URL in elib:https://elib.dlr.de/63490/
Document Type:Monograph (Other)
Additional Information:US Army AFDD Report, simulaneously published as NASA TM.
Title:An Assessment of 3-C PIV Analysis Methodology for HART II Measured Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lim, Joon W.lim (at) merlin.arc.nasa.govUNSPECIFIED
van der Wall, Berend G.Berend.vanderWall (at) dlr.deUNSPECIFIED
Date:July 2010
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:45
Status:Published
Keywords:HART II, Particle Image Velocimetry (PIV), vortex center, conditional averaging, vortex trajectory method, swirl velocity, vorticity, vortex core radius, centroid, Q criterion, lambda 2, convolution of lambda 2
Institution:NASA, US Army
Department:AFDD
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Active Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:25 Aug 2010 15:32
Last Modified:25 Aug 2010 15:32

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