| Citation: | ZUO B X，ZHOU B，DAI M L. Measurement of three-dimensional temperature and soot volume fraction for RP-3 jet fuel flame[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（4）：1273-1281 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0415
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RP-3 jet fuel is one of the frequently utilized fuels in aviation engines. Temperature and soot volume fraction distribution of flame are the vital data support for fuel optimization, which can directly indicate the state of combustion. The precision of the reconstruction path in three-dimensional measurement was influenced by camera position and attitude. A novel method that combines the radiation imaging system and the camera stereo calibration technology was proposed to address this problem. According to the results of numerical simulation, the method could not only guarantee the accuracy of measurement results, but also provide high spatial resolution. The experimental measurement of RP-3 and air premixed flame were carried out. The three-dimensional temperature and soot volume fraction distribution were also obtained by the calibrated six-camera system. The spatial resolution was $1 \;{\mathrm{mm}}\times $$ 1 \;{\mathrm{mm}}\times1 \;{\mathrm{mm}} $, and the uncertainty of temperature difference between reconstructed and thermocouple measured temperature was 0.58 K, demonstrating the accuracy of the method.
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