應用晶格波茲曼法於具多重擺動葉片之攪拌槽熱傳分析

Chieh Li Chen, Shing Cheng Chang, Yan Bai Lin

研究成果: Article

摘要

Lattice Boltzmann simulations of heat transfer in stirred tanks with two-, three- and four-blade oscillating impellers are performed. The Nusselt numbers of the tank caused by the three types of impellers are enlarged as Re increases. The influences of oscillating amplitude of impeller on heat transfer effect are investigated. It indicates that a large swept azimuth of the impeller would induce concentric-like flow structures, which are disadvantageous for heat transfer on tank walls. The results indicate that there exists a peak value of Nu on the tank walls as the oscillating amplitude of impeller is slightly less than the value to sweep whole tank azimuth. For the two- and three-blade impeller cases, the peak values occur at 70 and 50 degrees. Because the flow phenomena caused by the four-blade impeller is complex, there are other peaks of Nu observed except the primary peak at 40 degrees. It is also found that the concentric-like flow structures would be broken gradually at a higher oscillating angle. The present work shows that the type of impeller and relative operating parameters should be well chosen to get the best synergy of the flow and temperature fields.

指紋

Impellers
Flow structure
Heat transfer
Turbomachine blades
Nusselt number
Flow fields
Temperature distribution

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

引用此文

@article{2349c62d54264a1fb71a503ab2b6e9c8,
title = "應用晶格波茲曼法於具多重擺動葉片之攪拌槽熱傳分析",
abstract = "Lattice Boltzmann simulations of heat transfer in stirred tanks with two-, three- and four-blade oscillating impellers are performed. The Nusselt numbers of the tank caused by the three types of impellers are enlarged as Re increases. The influences of oscillating amplitude of impeller on heat transfer effect are investigated. It indicates that a large swept azimuth of the impeller would induce concentric-like flow structures, which are disadvantageous for heat transfer on tank walls. The results indicate that there exists a peak value of Nu on the tank walls as the oscillating amplitude of impeller is slightly less than the value to sweep whole tank azimuth. For the two- and three-blade impeller cases, the peak values occur at 70 and 50 degrees. Because the flow phenomena caused by the four-blade impeller is complex, there are other peaks of Nu observed except the primary peak at 40 degrees. It is also found that the concentric-like flow structures would be broken gradually at a higher oscillating angle. The present work shows that the type of impeller and relative operating parameters should be well chosen to get the best synergy of the flow and temperature fields.",
author = "Chen, {Chieh Li} and Chang, {Shing Cheng} and Lin, {Yan Bai}",
year = "2017",
month = "10",
day = "1",
language = "Chinese",
volume = "38",
pages = "469--478",
journal = "Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao",
issn = "0257-9731",
publisher = "Chinese Mechanical Engineering Society",
number = "5",

}

TY - JOUR

T1 - 應用晶格波茲曼法於具多重擺動葉片之攪拌槽熱傳分析

AU - Chen, Chieh Li

AU - Chang, Shing Cheng

AU - Lin, Yan Bai

PY - 2017/10/1

Y1 - 2017/10/1

N2 - Lattice Boltzmann simulations of heat transfer in stirred tanks with two-, three- and four-blade oscillating impellers are performed. The Nusselt numbers of the tank caused by the three types of impellers are enlarged as Re increases. The influences of oscillating amplitude of impeller on heat transfer effect are investigated. It indicates that a large swept azimuth of the impeller would induce concentric-like flow structures, which are disadvantageous for heat transfer on tank walls. The results indicate that there exists a peak value of Nu on the tank walls as the oscillating amplitude of impeller is slightly less than the value to sweep whole tank azimuth. For the two- and three-blade impeller cases, the peak values occur at 70 and 50 degrees. Because the flow phenomena caused by the four-blade impeller is complex, there are other peaks of Nu observed except the primary peak at 40 degrees. It is also found that the concentric-like flow structures would be broken gradually at a higher oscillating angle. The present work shows that the type of impeller and relative operating parameters should be well chosen to get the best synergy of the flow and temperature fields.

AB - Lattice Boltzmann simulations of heat transfer in stirred tanks with two-, three- and four-blade oscillating impellers are performed. The Nusselt numbers of the tank caused by the three types of impellers are enlarged as Re increases. The influences of oscillating amplitude of impeller on heat transfer effect are investigated. It indicates that a large swept azimuth of the impeller would induce concentric-like flow structures, which are disadvantageous for heat transfer on tank walls. The results indicate that there exists a peak value of Nu on the tank walls as the oscillating amplitude of impeller is slightly less than the value to sweep whole tank azimuth. For the two- and three-blade impeller cases, the peak values occur at 70 and 50 degrees. Because the flow phenomena caused by the four-blade impeller is complex, there are other peaks of Nu observed except the primary peak at 40 degrees. It is also found that the concentric-like flow structures would be broken gradually at a higher oscillating angle. The present work shows that the type of impeller and relative operating parameters should be well chosen to get the best synergy of the flow and temperature fields.

UR - http://www.scopus.com/inward/record.url?scp=85059755056&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059755056&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85059755056

VL - 38

SP - 469

EP - 478

JO - Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao

JF - Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao

SN - 0257-9731

IS - 5

ER -