Non-intrusive unsteady PSP technique for investigayion of transonic buffeting

Yosuke Sugioka, Kazuyuki Nakakita, Keisuke Asai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

In this study, transonic buffeting phenomena on a 2D airfoil and a 3D transport wing were analyzed with unsteady pressure-sensitive paint measurement. Polymer/ceramic PSPs with low surface roughness were applied to 2D- and 3D-Common Research Models in order to measure unsteady pressure distributions without intruding the flows. Unsteady pressure fields on the 2D airfoil were evaluated at Mach number of 0.74 and chord Reynolds number of 5 × 106. Pressure waves moving upstream at the angle of attack of 3° and a periodic shock oscillation under buffeting condition were clearly measured. A spectral analysis showed that the fundamental reduced frequency of the shock oscillation was 0.42 at the angle of attack of 6°. To demonstrate the effectiveness of unsteady PSP measurement on a 3D transport wing, wind-tunnel testing was conducted at Mach number of 0.85 and chord Reynolds number of 1.54 × 106. Pressure time histories and their spectra measured by the PSP agreed well with those obtained by an unsteady pressure transducers. Under the off-design conditions, complicated shock oscillations on the swept wing were observed. These results indicate that the PSPs can offer a powerful means to investigate transonic buffeting on aircraft.

Original languageEnglish
Title of host publication30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
PublisherInternational Council of the Aeronautical Sciences
ISBN (Electronic)9783932182853
Publication statusPublished - 2016 Jan 1
Event30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016 - Daejeon, Korea, Republic of
Duration: 2016 Sep 252016 Sep 30

Publication series

Name30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016

Other

Other30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
CountryKorea, Republic of
CityDaejeon
Period16/9/2516/9/30

Keywords

  • Pressure-sensitive paint
  • Transonic buffet
  • Unsteady measurement

ASJC Scopus subject areas

  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Materials Science(all)

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