The Development of Swirling Decaying Laminar Flow in an Annular Pipe

被引：0

作者：

Chen, Baiman ^{[1
]}

Qin, Frank G. F. ^{[1
]}

Shao, Youyuan ^{[1
]}

Xiao, Hanmin ^{[1
]}

Huang, Simin ^{[1
]}

Ho, Kelvin ^{[2
]}

机构：

[1] Dongguan Univ Technol, Coll Chem Engn & Energy Technol, Key Lab Distributed Energy Syst Guangdong Prov, Dongguan 523808, Peoples R China

[2] Univ Nottingham, Fac Engn, Jalan Broga, Semenyih 43500, Selangor Darul, Malaysia

来源：

2018 3RD INTERNATIONAL CONFERENCE ON ADVANCES ON CLEAN ENERGY RESEARCH (ICACER 2018) | 2018年 / 51卷

关键词：

HEAT-TRANSFER;

D O I：

10.1051/e3scconf/20185103001

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Work on the hydrodynamic entry length of pipe and duct flow has been well studied over the years. The assumption of fully developed flows is commonly used in many practical engineering applications (e.g. Moody's chart). For laminar axial pipe flow, the hydrodynamic entry length can be found through the monomial proposed by Kays, Shah and Bhatti (KSB) (Lh=0.056ReDh). In contrast, several approximations exist for fully turbulent flows (i.e. 10Dh-150Dh). Through theoretical and numerical investigations, the hydrodynamic entry length for swirling decaying pipe flow in the laminar regime is investigated. It was found that, the development length Lh for the axial velocity profile changes when a tangential component is added to the mean flow. The reduction in the hydrodynamic length was found to be dependent on the inlet swirl angle.. The results indicate that a modification can be made on the KSB equation for two-dimensional swirling annular pipe flow.

引用

页数：4

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