The Development of Unsteady Pressure-Sensitive Paint Technique and its Application to the Investigation of Transonic Buffeting

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• Yosuke Sugioka - Tohoku University, Japan
• Friday 13 July 2018, 13:00-14:00
• JDB Second Floor Meeting Room JD2-18, CUED.

If you have a question about this talk, please contact Kshitij Sabnis.

We present the development and capabilities of unsteady pressure-sensitive paint (PSP) technique for the investigation of transonic buffeting. PSP provides an optical measurement technique based on oxygen quenching of luminescence. The intensity or lifetime of light emitted by the PSP layer depends on oxygen partial pressure; thus, acquired luminescence images provide a way to calculate air pressure. In recent years, fast-response PSP with a highly diffusive porous binder is employed to measure time-resolved pressure distributions. However, there are several issues on existing fast-response PSPs, such as applicability, sensitivity characteristics, and surface roughness. In order to solve these issues, we have developed a sprayable polymer/ceramic PSP (PC-PSP) with reduced surface roughness, which has an arithmetic surface roughness of 0.5 microns and a frequency response of 3 kHz. The PC-PSP was applied to transonic wind tunnel tests, and transonic buffeting phenomena on a three-dimensional swept wing were analysed in detail.

This talk is part of the Engineering Fluids Group Seminar series.

This talk is included in these lists:

• Acoustics Lab Seminars
• Engineering Department Acoustics/Combustion Student seminars
• Engineering Fluids Group Seminar
• JDB Second Floor Meeting Room JD2-18, CUED

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