2024-03-29T15:57:08Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02003836
2022-10-31T01:45:13Z
1642837622505:1642837855274:1642837863204
1642838403551:1642838406845
平行平板流路内に千鳥状に平板を置いた場合の壁面熱伝達
Heat Transfer in a Rectangular Duct with Thin Plates Inserted in Staggered Arrangement
親川, 兼勇
新里, 隆男
Oyakawa, Kenyu
Shinzato, Takao
Comvective Heat Transfer
Heat Transfer Augmentation
Turbulence-Promoter
Pressure Drop
Duct Flow
This paper investigates how the local heat transfer coefficients and the friction facter are affected by the pitch and the clearance between thin plate and duct wall when thin plates (thickness: 5 mm, length: 20 mm) are set in a staggered arrangement in a rectangular duct in order to augment heat transfer from the duct wall.\nAverage heat transfer coefficient in fully developed region increases with a decreasing pitch and attains a maximum at P=4 (P: pitch), and its value is two times of that in smooth duct; the friction facter $\lambda$, on the other hand, increases five times at P=4, two times at P=12 in comparison with value of smooth duct.\nThe degree of augmentation is also analysed taking account of pressure loss. In the low-Reynolds number turbulent regime, $\eta$, which is the ratio of the average heat transfer for the present system to that for a smooth duct under the condition of equivalent pumping power, is larger than unity.
紀要論文
http://purl.org/coar/resource_type/c_6501
琉球大学工学部
1988-03
VoR
http://hdl.handle.net/20.500.12000/5570
0389-102X
AN0025048X
琉球大学工学部紀要
35
21
11
jpn
open access