3D Temperature Field Measurement of Soot Flame Based on Computed Tomography Imaging with Two-Color Method
A three-dimensional(3D)tomographic reconstruction algorithm based on multi-angle optical projection signal acquisition images of flame was established,which can be used to measure the 3D structure of irregular flames.A rotatable co-flow jet burner was designed to generate the stable irregular-profile non-premixed ethylene soot flame,and an intensified charge-coupled device(ICCD)camera was used to sequentially capture the full band,550 nm,and 650 nm narrow band 2D projected images of the natural luminescence signals of stable flame with 28 different angles.Combined with the developed 3D reconstruction program and the modified two-color method,the 3D temperature measurement of stable soot flame was achieved.The results show that the reconstruction method can reproduce the 3D spatial flame profile and temperature field distribution characteristics.The measured temperature value agreed well with the temperature range of laminar non-premixed ethylene soot flame.Moreover,to achieve a better reconstruction result,the number of projected images from different angles should not be less than 15 by this method.
soot flamecomputed tomography imaging3D temperature fieldtwo-color method
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