The direct-fired supercritical CO2 (sCO2) cycle is conceptually superior to many of the trending energy production technologies due to their remarkably promising efficiency, environmental friendliness and cost. The accurate simulation of this combustion is very important because the operating conditions are very challenging to its experimentation. Hence, the current work focuses on identifying various thermal, transport, chemical kinetic models, investigating various fundamental characteristics and verifying the validity of important underlying modeling assumptions in focus to supercritical CO2 combustion. In the current work, various thermal and transport property models are identified based on accuracy, computational cost and ease of implementation for sCO2 combustion simulations. Further, a validated chemical kinetic mechanism is developed for high-pressure and high-CO2 diluted combustion by incorporating state-of-art chemical kinetic rates which are specifically calculated for sCO2 combustor conditions. Also, crucial design considerations are provided for the design of sCO2 combustors based on 0-D and 1-D reactor models. Finally, important characteristics of non-premixed sCO2 combustion are examined by a canonical counterflow diffusion flame study.
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Vasu Sumathi, Subith
Doctor of Philosophy (Ph.D.)
College of Engineering and Computer Science
Mechanical and Aerospace Engineering
Length of Campus-only Access
Doctoral Dissertation (Campus-only Access)
Kancherla, Raghu Veera Manikantachari, "Fundamental Characteristics of Supercritical CO2 Combustion" (2019). Electronic Theses and Dissertations, 2004-2019. 6846.