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《Journal of Experiments in Fluid Mechanics》 2015-04
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Application of quantitative schlieren method in flame temperature measurement

Meng Sheng;Yang Zangjian;Wang Mingxiao;Shen Zhongliang;Deng Kai;Zhong Yingjie;Institute of Energy and Power Engineering,Zhejiang University of Technology;  
The frame temperature is measured using‘Z'type schlieren by standard photometric method.The relationship between the grayscale value of flame schlieren image and the deflection angle is established through a calibration lens.The refraction index is obtained by using axisymmetric assumption.Then by using the Gladstone-Dale relationship and the ideal gas law,the flame temperature is obtained.The comparison of involved inversion algorithms shows that,the direct integral method and the Abel inversion method can both achieve the least error,however,the Radon inversion strongly depends on the filter function and the algebraic reconstruction depends on the numbers of discrete points.The temperature reconstructed by the quantitative schlieren technique is compared to thermocouple measurements.The results prove the validation of this quantitative technique.
【Fund】: 浙江省科技厅基金资助项目(2014C31034)
【CateGory Index】: TK311
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