| 摘要 |
A method and apparatus for correcting for the temperature sensitivity of pressure sensitive paint using two layers of paint: one that is sensitive to both pressure and temperature and one that is sensitive to only temperature changes. A temperature sensitive paint layer or film is placed on a model to be tested in a wind tunnel for pressure changes over the surface of the model. The first film is responsive to temperature changes and has a magnitude of luminosity depending upon the temperature of the ambient air. Placed over the temperature film is a pressure sensitive paint or film that is sensitive primarily to pressure changes, but also to temperature changes, and produces a magnitude of luminosity depending upon the change in both temperature and pressure. The pressure paint layer is transparent to the luminescence of the temperature layer and a measurement of the luminosity of the temperature layer and the pressure layer is taken. The pressure layer luminosity is corrected for the temperature layer luminosity, thereby enabling a true pressure reading to be determined by comparing the magnitude of luminescence of both the temperature layer and the pressure layer.
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