Aeroacoustic analysis of a NACA 0015 airfoil with Gurney flap based on time-resolved PIV measurements

Xueqing Zhang, Andrea Sciacchitano, Stefan Pröbsting

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)
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Abstract

The present study investigates the feasibility of high-lift devices noise prediction based on measurements of time-resolved particle image velocimetry (TR-PIV). The model under investigation is a NACA 0015 airfoil with Gurney flap with height of 6% chord length. The velocity fields around and downstream the Gurney flap are measured by PIV and are used for the PIV-based noise predictions. The predictions are assessed via microphone measurements. Since the Gurney flap height is much smaller than the emitted acoustic wavelength, the source of noise can be considered compact and the integral implementation of Curle's analogy based on the unsteady aerodynamic loads can be followed. The results are compared with the simultaneous microphone measurements in terms of time histories and power spectra. The integral formulation of Curle's analogy yields acoustic sound pressure levels in good agreement with the simultaneous microphone measurements for the tonal component. All the calculated far-field noise power spectra reproduce the peak at vortex shedding frequency, which also agrees well with the microphone measurements.

Original languageEnglish
Title of host publicationProceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future
EditorsO. von Estorff, W. Kropp, B. Schulte-Fortkamp
PublisherGerman Acoustical Society (DEGA)
Pages227-238
Number of pages12
ISBN (Electronic)978-3-939296-11-9
Publication statusPublished - 21 Aug 2016
EventInter-Noise 2016: International Congress and Exposition on Noise Control Engineering - Hamburg, Germany
Duration: 21 Aug 201624 Sep 2016
Conference number: 45
http://www.internoise2016.org/
http://pub.dega-akustik.de/IN2016/data/index.html

Conference

ConferenceInter-Noise 2016
Abbreviated titleINTER-NOISE 2016
CountryGermany
CityHamburg
Period21/08/1624/09/16
Internet address

Keywords

  • Curle's aeroacoustic analogy
  • Gurney flap noise
  • Time-resolved PIV

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