2001 Volume 21 Issue 1Supplement Pages 325-328
A new type of pressure-sensitive paint for pressure measurement in a cryogenic wind tunnel is present. This paint is composed of Pyrene-based luminophores adsorbed onto anodized aluminum surface (AA-PSP). Various derivatives of Pyrene were calibrated by changing the mole fraction of oxygen in the 0.1 m Transonic Cryogenic Wind Tunnel (TCWT) at National Aerospace Laboratory (NAL). It has been verified that Pyrene-based AA-PSPs show high oxygen sensitivity in the 02 concentration range from 4 to 1000ppm. These AA-PSPs were applied to a 14%-thick circular arc-bump model and tested in TCWT at 100 Kelvin. Surface pressure distributions on the model were clearly imaged with high spatial resolution and S/N ratio. A comparison of the measured intensity data with the pressure tap measurements has suggested that the in situ calibration can be used to obtain quantitative pressure data.
