Mechanics & Industry
Volume 14, Number 4, 2013
|Page(s)||287 - 297|
|Published online||22 August 2013|
Experimental study of pressure drop reduction on in-line tube bundle using passive control
Laboratoire d’aérohydrodynamique navale, Département de génie
maritime, Mechanical Engineering Faculty, 31000
2 Laboratoire d’aéronautique et systèmes propulsifs, Département de Génie Mécanique, Mechanical Engineering Faculty, 31000 USTO Oran, Algeria
a Corresponding author:
Accepted: 30 June 2013
In the present paper an experimental investigation of drag reduction on in-line tube bundles with a configuration of seven by seven with a pitch ratio of 1.44 has been performed. Two longitudinal grooves are placed on the external surface of the circular cylinders as a passive control. The experiment is carried out using a subsonic wind tunnel. The pressure distributions for various azimuthal angles along the tubes are measured using a multi-channel differential pressure. Drag forces are also determined using a combined wire-strain gauge balance. The pressure drops are deduced from the resulting drag forces. The results obtained show an unexpected reduction in the pressure drop for the tube bundles. A reduction of 36.5% in the pressure drop for a Reynolds number of 1.33 × 104 is found compared to the configuration without grooves. Some correlations for the pressure drop are proposed.
Key words: Circular cylinder / tube bundles / pressure distribution / drag / grooves / Reynolds number
© AFM, EDP Sciences 2013
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