Effects analysis on combustion and thermal performance enhancement of a nozzle-inlet micro tube fueled by the premixed hydrogen/air. (1st October 2018)

• Record Type: Journal Article
• Authors: Peng, Qingguo; E, Jiaqiang; Yang, W.M.; Xu, Hongpeng; Chen, Jingwei; Meng, Tian; Qiu, Runzhi
• Is Part Of: Energy. Volume 160(2018)
• Page Start: 349
• Page End: 360
• Publication Date: 2018-10-01
• Subjects: Micro combustion -- Thermal performance -- Entropy generation -- Nozzle inlet micro tube; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2018.07.034
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: An investigation of premixed H2 /air combustion in a nozzle inlet micro tube has been carried out. The effects of inlet shape on combustion characteristics, flow field, specie distribution and thermal performance are presented and discussed. Also, effects of inlet mass flow rate and equivalence ratio on the entropy generations of combustion in the micro tubes are analyzed. The results show that the mean outer wall temperature and the emitter theoretical radiant efficiency of the nozzle inlet micro tube is higher than that of the straight micro tube. The total entropy generation rate of the nozzle inlet micro tube is lower than the straight micro tube. Moreover, the Inlet 2 and Inlet 3 nozzle inlet micro tube obtain a higher mean outer wall temperature and a lower exergy destruction, which are more appropriate for the application of the micro thermophotovoltaic (TPV) system. Highlights: A micro tube with nozzle inlet is proposed. Effects of inlet shape on combustion and thermal performance are involved. Effects analysis on the entropy generations is investigated. Suitable micro tube configuration is explored.