Numerical study on heat transfer of Stirling engine heater tube with rectangular micro-ribs

被引：6
|
作者：
Zhu, Hua [1 ]
Yang, Xiaohong [1 ,2 ]
Tian, Rui [1 ,3 ]
Han, Lei [1 ]
Wang, Liping [1 ]
机构：
[1] Inner Mongolia Univ Technol, Coll Energy & Power Engn, Hohhot, Peoples R China
[2] Minist Educ, Key Lab Wind Energy & Solar Energy Utilizat Techn, Hohhot, Peoples R China
[3] Inner Mongolia Univ Technol, Inner Mongolia Key Lab Renewable Energy, Hohhot, Peoples R China
来源：
NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS | 2020年 / 78卷 / 03期
基金：
中国国家自然科学基金;
关键词：
OSCILLATING FLOW; FLUID; OPTIMIZATION; PERFORMANCE;
D O I：
10.1080/10407790.2020.1777778
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Numerical simulations were carried out to study the heat transfer and friction characteristics for Stirling engine heater tubes with three-dimensional internal extended micro-rib. During the numerical simulations, phase angle in a cycle ranged from 0 degrees to 360 degrees. The results represent that the friction factor (f) increased with micro-rib length (L) and micro-rib height (H) for enhanced tube within the range of parameters in this study. For the micro-rib heat tube ofL = 60 mm andH = 0.9 mm, thejwas equal to 1.44 and the average Stanton numberStwas significantly improved up to 1.287 compared to smooth tube, the friction factor f was also increased by almost 2.32. The outlet pressure from 0.7 Mpa to 1 Mpa with the cosine change is presented as the phase angle increases. Therefore the benefits are apparent for micro-rib heat tube in Stirling engine.
引用
收藏
页码：141 / 159
页数：19
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