An inverse radiation analysis using soot emission measured by a high-speed stereoscopic imaging system is described for simultaneous estimation of the 3-D soot temperature and volume fraction distributions in unsteady sooty flames. A new iterative reconstruction method taking self attenuation into account is developed based on the least squares minimum-residual algorithm. Numerical assessment and experimental measurement results of an ethylene/air diffusive flame show that the proposed method is efficient and capable of reconstructing the soot temperature and volume fraction distributions in unsteady flames. The accuracy is improved when self attenuation is considered.
© 2012 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: October 28, 2011
Revised Manuscript: March 18, 2012
Manuscript Accepted: March 18, 2012
Published: May 18, 2012
Qunxing Huang, Fei Wang, Jianhua Yan, and Yong Chi, "Simultaneous estimation of the 3-D soot temperature and volume fraction distributions in asymmetric flames using high-speed stereoscopic images," Appl. Opt. 51, 2968-2978 (2012)