Abstract:
The accurate determination of spatially continuous temperature and pressure distribution on aerodynamic surfaces is critical for the understanding of complex flow mechanisms and for comparison with computational fluid dynamics predictions. Thermally sensitive phosphor coatings provide a way to obtain simple, inexpensive, full-field measurements of temperature with much higher spatial resolution. A new sort of two-color thermally sensitive phosphor coating was developed, which could be used to measure surface temperature between room temperature and 800 K. The various spectral regions in emission differ with temperature, which could be used to support the two-color temperature measurement method. The temperature calibration system was set up, and the intensity-ratio change curve as a function of temperature was obtained. The temperature distribution of curved surface was measured by two-color temperature measurement method. The results show that the two-color temperature measurement method has the ability of surface field temperature quantitative measurement.