https://doi.org/10.1051/epjconf/20159202046
Experimental investigation of turbulent flow past four grooved and smooth cylinders in an in-line square arrangement
1 Laboratoire d’aérohydrodynamique naval, Département de Génie Maritime, Mechanical Engineering Faculty, USTO Oran, Oran 31000 Algeria
2 Laboratoire d’aéronautique et systèmes propulsive Département de Génie Mécanique Mechanical Engineering Faculty, USTO Oran, Oran 31000 Algeria
Published online: 6 May 2015
An experimental study of turbulent flow past four cylinders in square arrangement with a space ratio of (T/D = P/D = 2.88) is performed. The investigation focuses on effects of Reynolds number and the shape of cylinders on the force and pressure coefficients of the cylinders. Two cases are investigated: four smooth cylinders (case1) and four grooved cylinders (case2). The cylinders are equipped with two grooves placed on the external surface at 90° and 270° degrees. The pressure distributions along the tubes (22 circumferential pressure taping) were determined for a variation of the azimuthal angle from 0 to 360deg. The drag and lift forces are measured using the TE 44 balance. The results show a bistable flow often exists behind the downstream cylinders is observed. By rising the Reynolds number the pressure coefficient increases in the absolute value.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
