Thermophysical Properties of Temperature-Sensitive Paint

Area of Science:

• Materials Science
• Aerospace Engineering
• Thermophysics

Background:

• Temperature-sensitive paint (TSP) is vital for visualizing surface temperature in wind tunnel tests.
• Characterizing TSP's thermophysical properties is challenging due to its thin-film application.
• Existing studies often use composite specimens or specific supports for TSP analysis.

Purpose of the Study:

• To experimentally determine reliable thermophysical data for TSP coatings.
• To investigate the thermal properties of TSP applied in thin layers.
• To establish standard measurement procedures for TSP characterization.

Main Methods:

• Gravimetric, thermogravimetric, and microcalorimetric analyses.
• Laser flash analysis for transversal thermal diffusivity.
• Temperature oscillation technique for in-plane effective thermal diffusivity.
• Scanning electron microscopy and dilatometric measurements.

Main Results:

• TSP layers demonstrate isotropic thermal diffusivity.
• All measured thermophysical parameters are typical for insulating materials.
• Reliable experimental data for TSP's thermal properties were obtained.

Conclusions:

• The study successfully characterized the thermophysical properties of TSP.
• TSP's insulating nature and isotropic thermal behavior were confirmed.
• The presented methodologies offer a pathway for future TSP research and application.