Chemiluminescence and Structure Characteristics in CH4/O2 Coflow Jet Diffusion Flames. (December 2017)

• Record Type: Journal Article
• Authors: Gong, Yan; Hu, Chonghe; Guo, Qinghua; Wu, Xiaoxiang; Yu, Guangsuo
• Is Part Of: Energy procedia. Volume 142(2017)
• Page Start: 1059
• Page End: 1064
• Publication Date: 2017-12
• Subjects: Diffusion flame -- flame state -- chemiluminescence -- equivalent ratio; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.12.356
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: The chemiluminescence characteristics of the excited state radicals are significant for spectrum-based diagnostics of practical diffusion flames. The detailed spatial profiles of OH* and CH* radicals in diffusion flames are investigated, and the effects of different conditions on the chemiluminescence and structure are studied. OH* emissions are obtained by the UV imaging system, while CH* emissions are captured by a novel high-spatial-resolution line-scan hyperspectral camera. The results show that there are three structure types in laminar flame along the flame propagating direction: jet core region, jet transition region and the jet fully developed region. However, the turbulent flame only has jet core region and transition region. Moreover, the two-dimensional distributions of OH* and CH* under different equivalent ratios ( [O/C]e ) also feature different characteristics.