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95738

Experimental Investigation of Heat Transfer and Pressure Drop inside Elliptic Tube with Inserted Helical Coils.

Article

Last updated: 22 Jan 2023

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Tags

Mechanical Power Engineering

Abstract

The paper deals with an experimental study of the influence of varying helical coil cross section diameter and pitches of helical coil on heat transfer and friction characteristics in an elliptical tube. The present work studies the effects of copper helical coils of circular cross section formed with different diameters of 2 and 6 mm at varying pitches (20, 45, 135 and 225 mm) inside elliptic tube. In the experiments, cold air at ambient condition is passed through the uniform heat flux circular tube for Reynolds numbers in a range of 11000 to 37500. The experimental results demonstrate that the use of helical coil inserts in elliptic tube leads to a higher heat transfer rate than that of the plain surface tube. Also, increasing helical coil cross section diameter and decreasing pitches of the helical yield a better heat transfer than the plain tube. The enhancement efficiencies of the helical coil cross section 6 mm over wire cross section 2 mm diameter at a pitch of 20 mm is 2.3% at Re=11000. The results are also correlated in the form of Nusselt number, friction factor and enhance efficiency as a function of Reynolds number, pitches and diameter of helical coil

DOI

10.21608/bfemu.2020.95738

Keywords

heat transfer, turbulent flow, helical coil, elliptic tub

Authors

First Name

Emad

Last Name

Ibrahim

MiddleName

Zidan

Affiliation

Mechanical Engineering Department, Faculty of Engineering Zagazig University

Email

emadz20022000@yahoo.com

City

-

Orcid

-

First Name

Mohamed

Last Name

Mohamed

MiddleName

Abd Halim

Affiliation

Mechanical Department, Faculty of Industrial Education, Suez University

Email

drhalim999@yahoo.com

City

-

Orcid

-

First Name

Mohamed

Last Name

Omara

MiddleName

-

Affiliation

Mechanical Department, Faculty of Industrial Education, Suez University

Email

omaratarek@yahoo.com

City

-

Orcid

-

First Name

Ahmed

Last Name

Badawy

MiddleName

ElSaid

Affiliation

Teacher, Industrial Technical School, Zagazig, Egypt

Email

ahmedbadawy.eg@gmail.com

City

-

Orcid

-

Volume

43

Article Issue

3

Related Issue

14274

Issue Date

2018-09-01

Receive Date

2018-02-01

Publish Date

2020-06-14

Page Start

24

Page End

33

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 43_Issue 3_Pages 24-33.pdf

PDF . 499.5kB

Link

https://bfemu.journals.ekb.eg/article_95738.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=95738

Order

7

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

MainTitle

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Details

Type

Article

Created At

22 Jan 2023