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SUMMARY:The Development of Unsteady Pressure-Sensitive Paint Technique and
  its Application to the Investigation of Transonic Buffeting - Yosuke Sugi
 oka - Tohoku University\, Japan
DTSTART:20180713T120000Z
DTEND:20180713T130000Z
UID:TALK108307@talks.cam.ac.uk
CONTACT:Kshitij Sabnis
DESCRIPTION:We present the development and capabilities of unsteady pressu
 re-sensitive paint (PSP) technique for the investigation of transonic buff
 eting. PSP provides an optical measurement technique based on\noxygen quen
 ching of luminescence. The intensity or lifetime of light emitted by the P
 SP layer depends on oxygen partial pressure\; thus\, acquired luminescence
  images provide a way to calculate air pressure. In recent years\, fast-re
 sponse PSP with a highly diffusive porous binder is employed to measure ti
 me-resolved pressure distributions. However\, there are several issues on 
 existing fast-response PSPs\, such as applicability\, sensitivity characte
 ristics\, and surface roughness. In order to solve these issues\, we have 
 developed a sprayable polymer/ceramic PSP (PC-PSP) with reduced surface ro
 ughness\, which has an arithmetic surface roughness of 0.5 microns and a f
 requency response of 3 kHz. The PC-PSP was applied to transonic wind tunne
 l tests\, and transonic buffeting phenomena on a three-dimensional swept w
 ing were analysed in detail.
LOCATION:JDB Second Floor Meeting Room JD2-18\, CUED
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