This paper investigates the influencing factors of the colorimetric radiation image temperature measurement method, including the representative wavelength, the calibration method, and the camera exposure time. A relatively high-precision method is next obtained for selecting a representative wavelength and calibration method. Then it is applied to the measurement of the combustion temperature of the solid propellant specimen. Finally, the temperature variation regularity of a different propellant was analyzed in the process of combustion. The results show that selecting the maximum response of each channel of the camera as the representative wavelength and the function construction method is more accurate for calibration and calculation. In the range of the photoelectric response of the camera, the exposure time has little effect on the temperature measurement accuracy. Compared with thermocouple temperature measurement results, the relative deviation of radiation image thermometry is −1.2%, which verifies the accuracy of radiation image thermometry.
Combustion Temperature Measurement of the Solid Propellant Specimen by Colorimetric Radiation Image
2025-01-01
Article (Journal)
Electronic Resource
English
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