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2007年 第1卷 第2期

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《能源前沿（英文）》 >> 2007年 第1卷 第2期 doi: 10.1007/s11708-007-0029-3

Application of digital holography to circle flow bed boiler measurement

1.Clean Energy and Environment Engineering Key Laboratory of MOE, Zhejiang University, Hangzhou 310027, China; 2.UMR 6614CORIA, Technopole du Madrillet, 76801 Saint-Etienne du Rouvray, France

发布日期： 2007-06-05
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The spatial distribution of particles in the boiler is very important in the study on the circle flow bed boiler (CFB). Digital in-line holography technique was applied to obtain the spatial and diameter distribution of the particles inside the boiler. A HE-NE laser was used to illuminate the particles inside the CFB through two glass windows and the in-line diffraction pattern was recorded by a CCD camera. The diffraction can be interpreted as a convolution between a family of wavelet functions and the object function. So the three-dimensional (3D) images of the particles in the two-phase flow were reconstructed by the convolution between diffraction pattern and wavelet functions. The particle diameters and 3D coordinates were calculated from the reconstructed 3D images by a series of image-processing methods, followed by a discussion of the experimental results.

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