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117589

EFFECT OF CORNER MODIFICATION ON TWO-DIMENSIONAL TURBULENT FLOW AROUND A SQUARE CYLINDER WITH INCIDENCE

Article

Last updated: 26 Dec 2024

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Subjects

-

Tags

Mechanical, Power, Production, Design and Mechatronics Engineering.

Abstract

RNG k- model is used to analyze the aerodynamic performance of an isolated square cylinder with different wind angles, turbulence intensities and corners shapes (sharp, chamfered and rounded). The analysis is made for unsteady two-dimensional turbulent flow. The results are presented in the form of drag coefficient, lift coefficient, RMS lift coefficient and Strouhal number. The present work is compared with previous experiments from published literature and the data gave a qualitative agreement. It is found that drag coefficient, lift coefficient, RMS lift coefficient and Strouhal number are sensitive to angle of incidence, turbulence intensity and corner modification. The average reduction in drag coefficient of square cylinder with modified corners is about 44.5 % for 6.5% turbulence intensity and 41.5 % for 14 % turbulence intensity compared with that of square cylinder with sharp corners. Results indicated that the best fit equation of drag coefficient of sharp corners square cylinder at 45 angle of incidence and 14% turbulence intensity in terms of Reynolds number; ranging from 3.0×104 to 2.825×105, is the second order polynomial equation; Cd = 0.0536×(Re/105)2 - 0.3518×(Re/105) + 2.0128.

DOI

10.21608/jesaun.2016.117589

Keywords

Numerical analysis, Aerodynamic forces, Corners shape, 2D turbulent flow

Authors

First Name

I. K.

Last Name

Mohamed

MiddleName

-

Affiliation

Mech. Power Dept., Faculty of Energy Engineering, Aswan University, Aswan, Egypt

Email

-

City

-

Orcid

-

First Name

W. A.

Last Name

Aissa

MiddleName

-

Affiliation

Mech. Power Dept., Faculty of Energy Engineering, Aswan University, Aswan, Egypt

Email

waessa@aswu.edu.eg

City

-

Orcid

-

Volume

44

Article Issue

No 1

Related Issue

16630

Issue Date

2016-01-01

Receive Date

2015-12-15

Publish Date

2016-01-01

Page Start

91

Page End

102

Print ISSN

1687-0530

Online ISSN

2356-8550

Article File

JESAUN_Volume 44_Issue No 1_Pages 91-102.pdf

PDF . 1.2MB

Link

https://jesaun.journals.ekb.eg/article_117589.html

Detail API

https://jesaun.journals.ekb.eg/service?article_code=117589

Order

6

Type

Research Paper

Type Code

1,438

Publication Type

Journal

Publication Title

JES. Journal of Engineering Sciences

Publication Link

https://jesaun.journals.ekb.eg/

MainTitle

EFFECT OF CORNER MODIFICATION ON TWO-DIMENSIONAL TURBULENT FLOW AROUND A SQUARE CYLINDER WITH INCIDENCE

Details

Type

Article

Created At

23 Jan 2023