Fast Pressure-Sensitive Paint for Flow and Acoustic Diagnostics

DOI Web Site 32 Citations
  • James W. Gregory
    Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio 43210;
  • Hirotaka Sakaue
    Aerodynamics Research Group, Japan Aerospace Exploration Agency, Tokyo 182-8522, Japan
  • Tianshu Liu
    Department of Mechanical and Aeronautical Engineering, Western Michigan University, Kalamazoo, Michigan 49008-5343
  • John P. Sullivan
    Department of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907-1971

Description

<jats:p> The development and capabilities of fast-responding pressure-sensitive paint (fast PSP) are reviewed within the context of recent applications to aerodynamic and acoustic investigations. PSP is an optical technique for determining surface pressure distributions by measuring changes in the intensity of emitted light, whereas fast PSP is an extension applicable to unsteady flows and acoustics. Most fast PSP formulations are based on the development of porous binders that allow for rapid oxygen diffusion and interaction with the chemical sensor. This article reviews the development of porous binders, the selection of luminophore molecules suitable for unsteady testing, dynamic calibrations of PSP, data-acquisition methods, and noteworthy applications for flow and acoustic diagnostics. Calibrations of the dynamic response of fast PSP show a flat frequency response to at least 6 kHz, with some paint formulations exceeding a response of 1 MHz. Various applications of fast PSP are discussed that highlight the capabilities of the technique, and concluding remarks highlight the need for the future development of fast PSP. </jats:p>

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