Effects of rectangular rib on exergy efficiency of a hydrogen-fueled micro combustor

被引：75
|
作者：
Li, Qingqing [1 ,2 ,3 ]
Zuo, Wei [1 ,2 ,3 ]
Zhang, Yuntian [1 ,2 ,3 ]
Li, Jing [1 ,2 ,3 ]
He, Zhu [1 ,2 ,3 ]
机构：
[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
[2] Natl Prov Joint Engn Res Ctr High Temp Mat & Lini, Wuhan, Peoples R China
[3] Wuhan Univ Sci & Technol, Minist Educ, Key Lab Ferrous Met & Resources Utilizat, Wuhan 430081, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 16期
关键词：
Micro combustor; Hydrogen-fueled; Rectangular rib; Exergy efficiency; ENTROPY GENERATION ANALYSIS; MESOSCALE DIVERGING COMBUSTOR; METHANE/AIR PREMIXED FLAME; NUMERICAL INVESTIGATIONS; CYLINDRICAL COMBUSTOR; ANCHORING MECHANISMS; THERMAL PERFORMANCE; ENTRANCE REGION; CAVITY; COUNTERFLOW;
D O I：
10.1016/j.ijhydene.2020.01.221
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In order to further optimize the working performance of micro-cylindrical combustor, the combustion chamber of the micro-cylindrical combustor is inserted in a rectangular rib. Extensive numerical investigations are conducted to compare the exergy efficiency of non-ribbed and rectangular-ribbed micro combustors under various hydrogen mass flow rates and hydrogen/air equivalence ratios. Moreover, the effects of dimensionless rib positions and heights on the exergy efficiency of micro-cylindrical combustor are also widely investigated. Results suggest that the exergy efficiency of the rectangular-ribbed micro combustor is significantly higher than that of the non-ribbed micro combustor under different inlet conditions. Moreover, the exergy efficiency of the rectangular-ribbed micro combustor is significantly affected by the dimensionless positions 1. The optimum dimensionless 1 is increased with the increase of hydrogen mass flow rate. This work offers us significant reference for optimizing the micro combustor in energy utilization. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：10155 / 10163
页数：9
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