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Boundary layer transition determination for periodic and static flows using phase‑averaged pressure data

Gardner, Anthony Donald and Richter, Kai (2015) Boundary layer transition determination for periodic and static flows using phase‑averaged pressure data. Experiments in Fluids, 56 (6), pp. 1-13. Springer. DOI: 10.1007/s00348-015-1992-9 ISSN 0723-4864

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Official URL: http://link.springer.com/article/10.1007/s00348-015-1992-9

Abstract

A method of boundary layer transition measurement is presented for wind tunnel models instrumented with surface pressure taps. The measurement relies on taking a number of theoretically identical measurements at different times and then analysing the standard deviation of the pressures. Due to the slight unsteady movement of the transition position, a peak in the standard deviation of pressure σCPpeak is found at the transition position, and this is correlated with measurements of the transition position with an infrared camera and hot film anemometers. In contrast to microphone measurements, it is shown that the transition detection works for data which has been low-pass filtered with a cutoff of 1 Hz. The application to static and dynamic transition measurements on static and periodically pitching helicopter rotor blade airfoils at Mach 0.3-0.5 is demonstrated.

Item URL in elib:https://elib.dlr.de/95088/
Document Type:Article
Additional Information:Published online: 03. June 2015, Article 119
Title:Boundary layer transition determination for periodic and static flows using phase‑averaged pressure data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gardner, Anthony Donaldtony.gardner (at) dlr.deUNSPECIFIED
Richter, Kaikai.richter (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:56
DOI :10.1007/s00348-015-1992-9
Page Range:pp. 1-13
Publisher:Springer
ISSN:0723-4864
Status:Published
Keywords:Boundary layer transition, wind tunnel, subsonic, helicopter, pitching airfoil
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: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Micknaus, Ilka
Deposited On:08 Jun 2015 13:10
Last Modified:06 Sep 2019 15:25

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