Numerical investigations on hydrogen-fueled micro-cylindrical combustors with cavity for micro-thermophotovoltaic applications

被引：79
|
作者：
Zuo, Wei [1 ,2 ,3 ]
Zhang, Yuntian [1 ,2 ,3 ]
Li, Qingqing [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] Wuhan Univ Sci & Technol, Natl Prov Joint Engn Res Ctr High Temp Mat & Lini, Wuhan 430081, Peoples R China
[3] Wuhan Univ Sci & Technol, Minist Educ, Key Lab Ferrous Met & Resources Utilizat, Wuhan 430081, Peoples R China
来源：
ENERGY | 2021年 / 223卷
关键词：
Micro-cylindrical combustor; Hydrogen-fueled; Cavity; Micro-thermophotovoltaic applications;
D O I：
10.1016/j.energy.2021.120098
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In order to enhance the thermal performance of micro-cylindrical combustors for microthermophotovoltaic applications, a micro-cylindrical combustor with cavity is designed. Extensive numerical investigations on micro-cylindrical combustors with and without cavity are implemented under different inlet velocities, hydrogen/air equivalence ratios and solid wall materials by ANSYS Fluent 16.0 with 9-species-19-reactions mechanism. It is found that the thermal performance of micro-cylindrical combustors with cavity is much better than that of micro-cylindrical combustors without cavity. This is attributed to that the cavity makes the burned gas closer to the back part of solid walls. Then, effects of cavity length and depth are analyzed and discussed. The optimal cavity length and outlet diameter of cavity is 6 mm and 2 mm, respectively. The mean outer wall temperature reaches 1306.88 K. Meanwhile, the mean nonuniformity of outer wall temperature is relatively low. All in all, the micro-cylindrical combustor with cavity has better potentiality for applications in micro-TPV system compared with the micro-cylindrical combustor without cavity. ? 2021 Elsevier Ltd. All rights reserved.
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页数：12
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