Development of 1D model for the analysis of heat transport in cylindrical micro combustors |
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| Authors: | Jun Li Siaw Kiang Chou Zhiwang Li Wenming Yang |
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| Affiliation: | 1. Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore;2. SSLS, National University of Singapore, 5 Research Link, Singapore 117603, Singapore;1. Department of Mechanical Engineering, College of Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand;2. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China;3. School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China;4. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;5. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100083, China;1. Indian Institute of Technology Bombay, Mumbai 400076, Maharashtra, India;2. Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, India |
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| Abstract: | A 1D flame model was developed to analyze the heat transport occurring in the cylindrical micro combustors. The one-step global reaction mechanisms were employed for three fuel–air mixtures (H2–air, CH4–air and C3H8–air) to account for the difference of fuel property in terms of the kinetics. The effects of various parameters such as the combustor size, fuel property, fuel–air equivalence ratio and unburned mixture temperature on the heat loss ratio (defined as Ql/Qin) and the heat recirculation ratio (defined as Qrecir/Ql) were investigated. The results indicated that these parameters have significant effects on the two ratios, and therefore should be carefully managed in order to achieve efficient and stable combustion. After comparing the results of different fuel–air mixtures, it is concluded that hydrogen is superior to methane and propane as the fuel for micro combustion engines owing to its higher flame temperature and thinner flame thickness, which favors the reduction of heat loss from the flame zone. |
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