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Experimental study of pressure drop reduction on in-line tubebundle using passive control

Published online by Cambridge University Press:  22 August 2013

Omar Ladjedel ,
Lahouari Adjlout ,
Tayeb Yahiaoui  and
Omar Imine
Omar Ladjedel*
Affiliation:
Laboratoire d’aérohydrodynamique navale, Département de génie maritime, Mechanical Engineering Faculty, 31000 USTO Oran, Algeria
Lahouari Adjlout
Affiliation:
Laboratoire d’aérohydrodynamique navale, Département de génie maritime, Mechanical Engineering Faculty, 31000 USTO Oran, Algeria
Tayeb Yahiaoui
Affiliation:
Laboratoire d’aéronautique et systèmes propulsifs, Département de Génie Mécanique, Mechanical Engineering Faculty, 31000 USTO Oran, Algeria
Omar Imine
Affiliation:
Laboratoire d’aéronautique et systèmes propulsifs, Département de Génie Mécanique, Mechanical Engineering Faculty, 31000 USTO Oran, Algeria
*
a Corresponding author:ladjedelomar@yahoo.com
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Abstract

In the present paper an experimental investigation of drag reduction on in-line tubebundles with a configuration of seven by seven with a pitch ratio of 1.44 has beenperformed. Two longitudinal grooves are placed on the external surface of the circularcylinders as a passive control. The experiment is carried out using a subsonic windtunnel. The pressure distributions for various azimuthal angles along the tubes aremeasured using a multi-channel differential pressure. Drag forces are also determinedusing a combined wire-strain gauge balance. The pressure drops are deduced from theresulting drag forces. The results obtained show an unexpected reduction in the pressuredrop for the tube bundles. A reduction of 36.5% in the pressure drop for a Reynolds numberof 1.33 × 104 is found compared to the configuration without grooves. Somecorrelations for the pressure drop are proposed.

Keywords

Circular cylindertube bundlespressure distributiondraggroovesReynolds number
Type
Research Article
Information
Mechanics & Industry , Volume 14 , Issue 4 , 2013 , pp. 287 - 297
Copyright
© AFM, EDP Sciences 2013

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