Effects of various coolants on flow and heat transfer characteristics in a round-tip pin-finned internal channel
(2021) In Heat Transfer Research 52(16). p.13-31- Abstract
This paper performs a numerical study regarding the effects of different kinds of coolants on flow and heat transfer in a pin-finned internal channel. A new pin-fin structure detached from one endwall with a round-tip is proposed which aims to increase the heat transfer enhancement. As a contrast, the investigation of the typical fully-attached pin-fin and the flat-tip detached pin-fin is also considered. In order to evaluate the reliability of the numerical method, an experiment of an internal channel with round-tip pin-fin arrays is conducted to serve as the reference, and all cases are carried out with the shear stress transport (SST) turbulence model. The effects of coolants including air, mist/air, steam, and mist/steam are... (More)
This paper performs a numerical study regarding the effects of different kinds of coolants on flow and heat transfer in a pin-finned internal channel. A new pin-fin structure detached from one endwall with a round-tip is proposed which aims to increase the heat transfer enhancement. As a contrast, the investigation of the typical fully-attached pin-fin and the flat-tip detached pin-fin is also considered. In order to evaluate the reliability of the numerical method, an experiment of an internal channel with round-tip pin-fin arrays is conducted to serve as the reference, and all cases are carried out with the shear stress transport (SST) turbulence model. The effects of coolants including air, mist/air, steam, and mist/steam are analyzed with the Reynolds number ranging from 15, 000 to 50, 000. The results reveal that the round-tip pin-fin outperforms in heat transfer enhancement and pressure loss deterioration among all three pin-fin structures. With respect to Reynolds numbers, the averaged Nusselt numbers increase gradually for all coolants, and cases of mist/steam achieve the highest values, followed by cases of steam, mist/air, and air, respectively, but the differences between the mist coolants and pure coolants are not obvious as the Reynolds number is lower than 30, 000. In conclusion, cases of mist/steam obtain the best thermal performances, and the internal channel with round-tip pin-fin arrays using mist/steam as coolant is most favorable.
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- author
- Ye, Lv ; Yang, Xing ; Chen, Xianyun ; Feng, Zhenping and Sunden, Bengt LU
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Heat transfer enhancement, Internal cooling channel, Mist cooling, Round-tip pin-fin structure, Thermal performance factor
- in
- Heat Transfer Research
- volume
- 52
- issue
- 16
- pages
- 19 pages
- publisher
- Begell House
- external identifiers
-
- scopus:85117930976
- ISSN
- 1064-2285
- DOI
- 10.1615/HEATTRANSRES.2021039475
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021 by Begell House, Inc.
- id
- f51b4e9a-de79-435b-8dd6-228ac2b64a85
- date added to LUP
- 2021-11-16 15:51:47
- date last changed
- 2023-10-11 05:18:00
@article{f51b4e9a-de79-435b-8dd6-228ac2b64a85,
abstract = {{<p>This paper performs a numerical study regarding the effects of different kinds of coolants on flow and heat transfer in a pin-finned internal channel. A new pin-fin structure detached from one endwall with a round-tip is proposed which aims to increase the heat transfer enhancement. As a contrast, the investigation of the typical fully-attached pin-fin and the flat-tip detached pin-fin is also considered. In order to evaluate the reliability of the numerical method, an experiment of an internal channel with round-tip pin-fin arrays is conducted to serve as the reference, and all cases are carried out with the shear stress transport (SST) turbulence model. The effects of coolants including air, mist/air, steam, and mist/steam are analyzed with the Reynolds number ranging from 15, 000 to 50, 000. The results reveal that the round-tip pin-fin outperforms in heat transfer enhancement and pressure loss deterioration among all three pin-fin structures. With respect to Reynolds numbers, the averaged Nusselt numbers increase gradually for all coolants, and cases of mist/steam achieve the highest values, followed by cases of steam, mist/air, and air, respectively, but the differences between the mist coolants and pure coolants are not obvious as the Reynolds number is lower than 30, 000. In conclusion, cases of mist/steam obtain the best thermal performances, and the internal channel with round-tip pin-fin arrays using mist/steam as coolant is most favorable.</p>}},
author = {{Ye, Lv and Yang, Xing and Chen, Xianyun and Feng, Zhenping and Sunden, Bengt}},
issn = {{1064-2285}},
keywords = {{Heat transfer enhancement; Internal cooling channel; Mist cooling; Round-tip pin-fin structure; Thermal performance factor}},
language = {{eng}},
number = {{16}},
pages = {{13--31}},
publisher = {{Begell House}},
series = {{Heat Transfer Research}},
title = {{Effects of various coolants on flow and heat transfer characteristics in a round-tip pin-finned internal channel}},
url = {{http://dx.doi.org/10.1615/HEATTRANSRES.2021039475}},
doi = {{10.1615/HEATTRANSRES.2021039475}},
volume = {{52}},
year = {{2021}},
}