Zhicong Li
@hust.edu.cn
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering
Huazhong University of Science and Technology
I am currently pursuing the Ph.D. degree with State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, China. My current research interests include combustion diagnostics (regularized reconstruction of soot volume fraction and temperature, measurement of atomic ratios based on LIBS) and soot formation (the effect of flame structure/stoichiometric mixture fraction on soot formation and oxidation, the relationship between soot formation and chemiluminescence).
RESEARCH INTERESTS
Diffusion flames; Soot formation; Chemiluminescence; Image Processing; Combustion diagnosis; Inverse Problems
Scopus Publications
Scopus Publications
Zhicong Li, Chun Lou, and Chun Zou
Elsevier BV
Zhicong Li, Chun Lou, and Benjamin M. Kumfer
Elsevier BV
Zhicong Li, Chun Lou, Chun Zou, Weijie Yan, and Benjamin M. Kumfer
Elsevier BV
Shusen Wang, Chun Zou, Chun Lou, Haiping Yang, Yang Pu, Jianghui Luo, Chao Peng, Cong Wang, and Zhicong Li
Elsevier BV
Zhicong Li and Chun Lou
Informa UK Limited
Yongsheng Jia, Zhicong Li, Yingjie Wang, Xun Wang, Chun Lou, Bo Xiao, and Mooktzeng Lim
American Chemical Society (ACS)
This work established a high-speed camera-assisted visualization system that investigated the effect of volatile matter and fixed carbon content in biomass particles on single-particle combustion phases and their luminous properties. Three types of biomass particles, namely, sawdust (a mixture of pine and willow), corncob, and rice husk, were examined on a Hencken flat-flame burner. The luminous region and intensity of single biomass particles were closely related to the flammability and calorific value of biomass fuel and derived by analyzing a sequence of images captured using a high-speed camera. The combustion temperature was determined through analysis of its radiant energy. The results showed that the ignition mechanisms of volatile matter and fixed carbon corresponded to homogeneous and heterogeneous reactions, respectively. The maximum luminous region values of 1.75 × 106, 2.1 × 106, and 1.0 × 106 μm2 for sawdust (SD), corncob (CC), and rice husk (RH) correlated to the volatile matter content of each biomass sample, which was 69.38, 74.15, and 64.56%, respectively. Because of the high fixed carbon content, the peak temperature of the SD particles could reach 1549 °C. The luminous region and intensity of the combusting particles were significantly affected by the volatile matter and fixed carbon, respectively.
Chaoyang Wang, Guangtong Tang, Huibo Yan, Lujiang Li, Xiaopei Yan, Zhicong Li, and Chun Lou
MDPI AG
Oxy-combustion with high flame temperature, low heat loss, high combustion efficiency, and low NOx emissions is being extensively studied. The thermal radiation from soot particles and gases in oxy-combustion accounts for the vast majority of the total heat transfer. Based on a detailed chemical reaction mechanism coupled with the soot particle dynamics model and optically thin radiation model, the influence of the flame structure and temperature distribution on the thermal radiation in oxygen-enriched counterflow diffusion flames was studied in this paper. The results revealed that reasonable assignment of total recycled flue gas and the degree of dilution of fuel and oxidant were critical, which can be used to adjust the overall radiation situation of the flame. At the same adiabatic flame temperature, as the fuel concentration decreased and the oxidant concentration increased (the stoichiometric mixture ratio is from 0.3 to 0.6), the soot formation decreased, which led to the particle radiation disappearing while the main radiation zone of gases moved 0.04 cm toward the fuel side. At the same stoichiometric mixture fraction (0.4), the radiation area was broadened and the radiation of soot particles was gradually enhanced with the adiabatic flame increasing from 2300 K to 2700 K.
Chun Lou, Zhicong Li, Yindi Zhang, and Benjamin M. Kumfer
Elsevier BV
Zhicong Li, Ludong Zhang, and Chun Lou
Institute of Electrical and Electronics Engineers (IEEE)
To investigate soot formation and oxidation mechanism in combustion processes, determination of soot volume fraction (SVF) and temperature distributions in laminar co-flow axisymmetric soot-laden flames are still crucially important. This study provides a convenient and low-cost solution with a new inversion algorithm for in-situ measurements of SVF and temperature in axisymmetric soot-laden flames. The measurement instrumentation combines an industrial color camera and a tablet computer for in-situ measurements of SVF and temperature in three kinds of experimental flames. Based on the flame image processing, the Tikhonov regularization coupled with a generalized singular value decomposition (TR-GSVD) algorithm is proposed to do the inversion process. Comparing with common inversion algorithms, the TR-GSVD algorithm provides more accurate results. The measurement results show that the reduction in fuel flow of normal diffusion flame would result in higher temperature and lower SVF through the combined effect of radiant heat loss and fuel pyrolysis. The decrease of the equivalent ratio of partially premixed flame leads SVF to increase first and then decrease, and temperature to rise continuously, which is caused by the effect of fuel pyrolysis and the competition of soot formation and oxidation. For inverse diffusion flame, an increase in oxidant flow and a decrease in fuel flow lead to higher SVF and temperature, which is believed to be caused by the reduction of overall equivalence ratio. The detailed explanation is that the enhanced exothermic reactions lead to the temperature rise, and both the temperature and fuel pyrolysis affect soot formation.
Zhongnong Zhang, Zhicong Li, and Chun Lou
Elsevier BV