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174521

Heat Transfer and Friction in Annular Tubes Carrying Gas Flow with Helically-Triangular-Rib Roughness on the Inner Surface.

Article

Last updated: 22 Jan 2023

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Subjects

-

Tags

Mechanical Power Engineering

Abstract

This paper presents the results of an experimental investigation into the average heat transfer and friction characteristics of gas flow in annuli. The results are measured at five annular passages having a smooth outer tube with inside diameter of 45 mm, wall thickness of 5 mm and length of 3050 mm, and interchangeable inner tubes with total length of 2000 mm and the rough part 540 mm long. The results of the helical-triangular-rib surface geometry are measured for four helix angles (α = 59̀, 2o 45̀̀̀̀̀̀, 4o 32̀, and 6o 17̀̀) all having a relative roughness size (e/d) of 0.1.
The helical-rib relative spacings (c/e) equal to 0.54, 1.51, 2.49 and3.47, In addition to the four rough tubes, a smooth tube geometry is tested to validate the experimental procedure. Air is use as a working fluid, encompassing flow range 3900
The data are correlated in a form to permit performance prediction. The benefits of the roughness for heat exchanger applications are quantitatively established.

DOI

10.21608/bfemu.1987.174521

Authors

First Name

M.

Last Name

Shalaby

MiddleName

A.

Affiliation

Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt.

Email

m.25jan@yahoo.com

City

Mansoura

Orcid

-

Volume

12

Article Issue

1

Related Issue

25312

Issue Date

1987-06-01

Receive Date

1987-05-27

Publish Date

2021-06-01

Page Start

43

Page End

52

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 12_Issue 1_Pages 43-52.pdf

PDF . 889.4kB

Link

https://bfemu.journals.ekb.eg/article_174521.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=174521

Order

26

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

22 Jan 2023