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Rotor wake vortex definition–evaluation of 3-C PIV results of the HART-II study

Burley, Casey L. and Brooks, Thomas F. and Rozier, Kristen Y. and van der Wall, Berend G. and Richard, Hughes and Raffel, Markus and Beaumier, Philippe and Delrieux, Yves and Lim, Joon W. and Yu, Yung H. and Tung, Chee and Pengel, Kurt and Mercker, Edzard (2006) Rotor wake vortex definition–evaluation of 3-C PIV results of the HART-II study. International Journal of Aeroacoustics, 5, (1), pp. 1-38. Sage Publications. DOI: 10.1260/147547206775220434 ISSN 1475-472X

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Official URL: https://multiscience.metapress.com

Abstract

An evaluation is made of extensive three-component (3-C) particle image velocimetry (PIV) measurements within the wake across a rotor disk plane. The model is a 40 percent scale BO-105 helicopter main rotor in forward flight simulation. This study is part of the HART II test program conducted in the German-Dutch Wind Tunnel (DNW). Included are wake vortex field measurements over the advancing and retreating sides of the rotor operating at a typical descent landing condition important for impulsive blade-vortex interaction (BVI) noise. Also included are advancing side results for rotor angle variations from climb to steep descent. Using detailed PIV vector maps of the vortex fields, methods of extracting key vortex parameters are examined and a new method was developed and evaluated. An objective processing method, involving a centerof-vorticity criterion and a vorticity “disk” integration, was used to determine vortex core size, strength, core velocity distribution characteristics, and unsteadiness. These parameters are mapped over the rotor disk and offer unique physical insight for these parameters of importance for rotor noise and vibration prediction.

Item URL in elib:https://elib.dlr.de/95033/
Document Type:Article
Additional Information:Published online: 2006
Title:Rotor wake vortex definition–evaluation of 3-C PIV results of the HART-II study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Burley, Casey L.NASA Langley Research Center, USAUNSPECIFIED
Brooks, Thomas F.NASA Langley Research Center, USAUNSPECIFIED
Rozier, Kristen Y.NASA Langley Research Center, USAUNSPECIFIED
van der Wall, Berend G.Berend.vanderWall (at) dlr.deUNSPECIFIED
Richard, HughesUNSPECIFIEDUNSPECIFIED
Raffel, Markusmarkus.raffel (at) dlr.deUNSPECIFIED
Beaumier, PhilippeONERA, FranceUNSPECIFIED
Delrieux, YvesONERA, FranceUNSPECIFIED
Lim, Joon W.US Army AFDD, NASA Ames Research Center, USAUNSPECIFIED
Yu, Yung H.US Army AFDD, NASA Ames Research Center, USAUNSPECIFIED
Tung, CheeUS Army AFDD, NASA Ames Research Center, USAUNSPECIFIED
Pengel, KurtDNW, The NetherlandsUNSPECIFIED
Mercker, EdzardDNW, The NetherlandsUNSPECIFIED
Date:2006
Journal or Publication Title:International Journal of Aeroacoustics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:5,
DOI :10.1260/147547206775220434
Page Range:pp. 1-38
Publisher:Sage Publications
Series Name:Januar 2006
ISSN:1475-472X
Status:Published
Keywords:rotor noise, particle image velocimetry (PIV), wake vortex
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Braunschweig , Göttingen
Institutes and Institutions:?? undefined ??
Institute of Flight Systems > Rotorcraft
Deposited By: Micknaus, Ilka
Deposited On:11 Feb 2015 16:55
Last Modified:06 Sep 2019 15:18

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