Tomographic Reconstruction of Asymmetric Soot Structure from Multi-angular Scanning

Article type: Research Article

Authors: Lee, S.M. | Hwang, J.Y. | Chung, S.H.

Affiliations: Emission Control Group, Korea Institute of Machinery and Materials, Daejeon, 305-343, Korea | School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea. E-mail: [email protected]

Abstract: A tomographic deconvolution technique using the Fourier transformation has been applied for the reconstruction of asymmetric soot structure. Local soot volume fraction distribution can be identified from line-of-sight integrated data using light extinction measurements with multi-angular scanning. A peak-following interpolation technique was adopted to effectively increase the number of scanning angles. The results showed that the peak-following interpolation has improved the accuracy of reconstruction compared to the arithmetic interpolation in determining the local soot volume fraction. The measurement from a laser-induced incandescence technique substantiated the validity of the reconstruction technique.

Keywords: Soot, Tomography, Peak-following interpolation, Light extinction

Journal: Journal of Visualization, vol. 7, no. 2, pp. 159-166, 2004