Numerical Simulation of the Controlled Fluid Flow Around the Cylinder Using Compound Actuators

Author

Abstract

Abstract
In present paper, the fluid flow around the cylinder has been controlled to change the pattern flow. Flow control methods are classified into two types,that were called active and passive methods.In this work, the compound method is applied, the splitter plate in the wake zone as passive method and EHD actuators as active method have been applied simultaneously. For simulation of fluid flow, Navier Stoks equations for fluid flow and conversation of electric charge and Poisson equations for electric field are calculated numerically by finite volume approach. The length of the splitter plate is equal the diameter of the cylinder and it is connected to the ground as well as the cylinder surface. ،The wire electrodes and the cylinder are used as EHD actuators. Calculations are done for the low Re number, Re=40 and the applied voltage V=10,20 kV. The results show that the presence of the splitter plate at low Re number does not stabilize the wake zone and the vortexes behind the cylinder start to move.
Keywords: Ion Wind; Drag Force; ElectroHydroDynamic Actuator; Splitter Plate.

Keywords

Main Subjects


[1] Hauksbee F (1719) Physico-mechanical experiments on various subjects. London, 46-47.
[2] Chattock AP (1899) On the velocity and mass of ions in the electric wind air. Phil  Magazine 48: 401-420.
[3] Marco SM, Velkoff HR (1963) Effect of electrostatic fields on free convection heat transfer from flat plates. ASME Paper No. 63-HT-9.
[4] اسماعیل زاده الف، آقازینالی م (1385) مدل سازی عددی جریان سیال حول استوانه تحت تأثیر یک محرّک الکتروهیدرودینامیکی. مجله فنی دانشگاه تبریز 9-1 :30.
[5] Artana G, Sosa R, Moreau E, Touchard G (2002) Control of the near-wake flow around a circular cylinder with electrohydrodynamic actuators. Exp Fluids 35: 580-588.
[6] Leger L, Moreau E, Touchard G (2002) Effect of a DC corona electrical discharge on the air flow along a flat plate. Ieee T Ind Appl 38(6): 1478-1485.
[7] Artana G, Adamo JD, Leger L, Moreau E, Touchard G (2001) Flow control with electrohydrodynamic actuators. 39th AIAA Aerospace Conf., Reno, Paper 03-51.
[8] Chang JS, Brocilo D, Urashima K, Dekowski J, Podlinski J, Mizeraczyk J, Touchard G (2006) Onset of EHD turbulence for cylinder in cross flow under corona discharges. J Electrostat 64: 569-573.
[9] Roshko A (1954) On the drag and shedding frequency of two-dimensional bluff bodies. National advisory committee for aeronautics, Technical Note 3169, 1-29.
[10] Bearman PW (1965) Investigation of the flow behind a two dimensional model with a blunt trailing edge and fitted with splitter plates, J Fluid Mech 21: 241-255.
[11] Lin SY, Wu TM (1994) Flow control simulations around a circular cylinder by a finite volume scheme. Numer Heat Tr A-Appl 26: 301.
[12] Ozono S (2000) Flow control of vortex shedding by asymmetrically arranged plates. J Theoret Appl Mech 49: 191-196.
[13] JY Hwang, KS Yang, SH Sun (2003) Reduction of flow-induced forces on circular cylinder using a detached splitter plate. Phys Fluids 15(8): 2433-2436.
[14] Akilli H, Sahin B, Tumen NF (2005) Suppression of vortex shedding of circular cylinder in shallow water by a splitter plate. Flow Meas Instrum 16: 211-219.
[15] Tiwari S, Chakraborty D, Biswas G, Panigrahi PK (2005) Numerical prediction of flow and heat transfer in a channel in the presence of a built-in circular tube with and without an integral wake splitter. Int J Heat Mass Tran 48: 439-453.
[16] Kasayapanand N (2008) Electrohydrodynamic enhancement of heat transfer in vertical fin array using computational fluid dynamics technique. Int Commun Heat Mass 35: 762-770.
[17] Landau LD, Lifshitz EM (1963) Electrodynamics of continuous media. Pergamon, New York.
[18] Grosu FP, Bologa MK (1968) Similarity criteria for convective heat exchange in an electric field. Appl Elec Phenom (USSR) 20:120-125
[19] Batchelor GK (2000) An introduction to fluid dynamics. Cambridge mathematical library.