Combustion characteristics and thermal enhancement of premixed hydrogen/air in micro combustor with pin fin arrays |
| |
| Affiliation: | 1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China;2. Center for Energy and Environmental Policy Research, Beijing Institute of Technology, Beijing 100081, China;3. State Key Lab. of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;4. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, China;5. Chongqing University Cancer Hospital, Chongqing 400030, China;1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;2. Guangzhou Institute of Energy Conversion, CAS, Guangzhou 510640, China;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing, 400030, China;2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China;3. College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing, 400044, PR China;2. Key Laboratory for Biorheological Science and Technology of Ministry of Education (Chongqing University), Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, 400044, PR China;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, PR China;2. Key Laboratory for Biorheological Science and Technology of Ministry of Education (Chongqing University), Chongqing University Cancer Hospital, Chongqing Cancer Institute, Chongqing, 400044, PR China |
| |
| Abstract: | Targeted at improving the combustion stability and enhancing heat transfer in micro combustor, the combustion characteristics and thermal performance of micro combustor with pin fin arrays are numerically investigated by employing detail H2/O2 reaction mechanism. It is shown that the micro combustor with staggered pin fin arrays exhibits the highest average temperature and heat flux of external wall, while the micro combustor with in-line pin fin arrays displays the most uniform temperature distribution of external wall. When the equivalence ratio is 1.1, all micro combustors exhibit the highest mean temperature and heat flux of external wall. The micro combustor materials with high thermal conductivity can not only improve the average temperature and heat flux of external wall, but also enhance heat transfer to the upstream which can preheat the mixed gas. Therefore, the materials with high thermal conductivity, such as red copper and aluminum, can make up for the nonuniform temperature distribution of micro combustor with staggered pin fin arrays, so as to realize uniform high heat flux output of external wall. |
| |
| Keywords: | Micro combustor Heat transfer enhancement Pin fin arrays Equivalence ratio Materials |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
