Open Access Open Access  Restricted Access Subscription or Fee Access

The Effect of the Addition of Inlet Disturbance Body (IDB) to Flow Resistance Through the Square Cylinders Arranged in Tandem


(*) Corresponding author


Authors' affiliations


DOI: https://doi.org/10.15866/ireme.v11i3.11338

Abstract


Flow resistance through the square cylinders arranged in tandem, with the addition of Inlet Disturbance Body (IDB) in the form of circular cylinder, was analyzed by computational fluid dynamics (CFD) simulation using FLUENT 6.3.26 software as well as by experiments on resistance force and pressure distribution analysis. There were 5 (five) Reynolds numbers (ReD) employed for the entire samples. Reynolds numbers were calculated based on condition of square cylinders arranged in tandem with diameter (D) of 70 mm. ReD values gained range from 30,625 to 96,250. The ratios of diameter of IDB circular cylinder and diameter of square cylinders diameter (d/D) were varied in three (3) levels, d/D = 0.08; 0.14 and 0.20, while the ratios of the distance between the cylinders and square cylinder diameter (L/D) were varied in 8 (eight) levels of L/D = 0.0 to 1.0. The experimental results showed the pattern of the value of drag coefficient (CD) and pressure coefficient (CP) decreasing with an increase in L/D and d/D. Lowest values of CD and CP obtained were 1.67 and  0.87 respectively for L/D = 0.43 and d/D = 0.14 for all values of the Reynolds number. It was caused by flow separation absorbed by the addition of IDB circular cylinder prior to the square cylinder arranged in tandem. For the value of L/D larger or smaller than 0.43, the values of CD  and CP escalate because the vortex flow was pushed upward the flow, hence causing the boundary layer on top of the square cylinder to increase. This phenomenon is validated with CFD simulation. Placement of a circular cylinder as IDB mounted prior to square cylinders arranged in tandem is resulting in the reduction of  resistance of square cylinder from CD = 2.13 to CD= 1.67 or as many as 21.5962% and reduction of the pressure distribution of CP = 1.02 to CP = 0.87 or at 14.7059%. Based on these results, the optimal values of L/D and d/D due to the addition of IDB were L/D = 0.43 and d/D = 0.14 with values of CD = 1.67 and CP = 0.87.
Copyright © 2017 Praise Worthy Prize - All rights reserved.

Keywords


Diameters Ratio d/D; Distance/Diameter Ratio L/D; IDB (Inlet Disturbance Body); Drag Coefficient CD; Pressure Coefficient CP; Reynolds Number ReD

Full Text:

PDF


References


Alam, M.M., Sakamoto, H., Moriya, M., & Takai, K., (2003) Fluctuating Fluid Forceacting on Two Circular Cylinders in a Tandem Arrangement at a Subcritical Reynolds Number, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 91, pp. 139-154.

Lee, S., S. Lee, & C. Park, (2004) Reducing the Drag on a Circular Cylinder by Upstream Installation of a Small Control Rod, Fluid Dynamics Research, Vol. 34, pp. 233-250.
http://dx.doi.org/10.1016/j.fluiddyn.2004.01.001

Tsutsui, T. & T. Igarashi, (2002) Drag Reduction of a Circular Cylinder in an Air-Stream, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 90, pp. 527-541.
http://dx.doi.org/10.1016/s0167-6105(01)00199-4

Salam Nasaruddin, I.N.G. Wardana, Slamet Wahyudi & Denny Widhiyanuriyawan, (2014) Fluid Flow Through Triangular and Square Cylinders, Australian Journal of Basic And Applied Sciences, Vol. 8, n. 2, pp. 193-200.
http://dx.doi.org/10.4028/www.scientific.net/amm.836.289

Etminan A., M. Moosavi and N. Ghaedsharafi, (2011) Characteristics of Aerodynamics Forces Acting on Two Square Cylinders in the Streamwise Direction and its Wake Patterns, Advances in Control, Chemical Engineering, Civil Engineering and Mechanical Engineering, pp.209-217.
http://dx.doi.org/10.1016/0167-6105(92)90522-c

Daloglu, A., (2008) Pressure Drop in a Channel with Cylinder in Tandem Arrangement, International Communication in Heat and Mass Transfer, Vol. 35, pp. 76-83.
http://dx.doi.org/10.1016/j.icheatmasstransfer.2007.05.011

Hasebe Hiroshi, Watanabe Kenji, Watanabe Yuki and Takashi Nomura Takashi,(2009) Experimental Study On The Flow Field Between Two Square Cylinders In Tandem Arrangement, The Seventh Asia-Pacific Conference on Wind Engineering (APCWE-VII),Taipei, Taiwan.
http://dx.doi.org/10.5359/jawe.39.173

Lankadasu A. & Vengadesan S., (2007) Interference Effect of Two Equal-Sized Square Cylinders in Tandem Arrangement: with Planar Shear Flow, International Journal for Numerical Methods in Fluids.
http://dx.doi.org/10.1002/fld.1670

Karthik Selva Kumar, K., Kumaraswamidhas, L., Numerical Study on Fluid Flow Characteristics Over the Side-By-Side Square Cylinders at Different Spacing Ratios, (2014) International Review of Mechanical Engineering (IREME), 8 (5), pp. 962-969.
http://dx.doi.org/10.15866/ireme.v8i5.3709

Nabovati, A., Sousa, A., LBM Mesoscale Modeling of Porous Media, (2015) International Journal on Heat and Mass Transfer - Theory and Applications (IREHEAT), 3 (4).

Wang X.K. & Tan S.K, (2012) Flow around four circular cylinders in square configuration, 18th Australasian Fluid Mechanics Conference Launceston, Australia.

Sumner D., Price S.J. & Paidoussis M.P., (2000) Flow-pattern Identification for Two Staggered Circular Cylinders in Cross-Flow, Journal Fluid Mechanics, Vol.411, pp. 263-303.

Islam Shams Ul, Zhou Chao Ying & Ahmad Farooq, (2009) Numerical Simulations of Cross-Flow around Four Square Cylinders in an In-Line Rectangular Configuration, World Academy of Science, Engineering and Technology International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering, Vol. 3, No. 9, pp. 1138-1147.

Nidhul K, Sunil A S & Kishore V., (2015) Numerical Investigation of Flow Characteristics over a Square Cylinder with a Detached Flat Plate of Varying Thickness at Critical Gap Distance in the wake at Low Reynolds Number, International Journal of Research in Aeronautical and Mechanical Engineering (IJRAME), Vol. 3, No.1, pp.104-118.

Ozgoren Muammer & Dogan Sercan, (2012) Quantitative Flow Characteristics For Side-By-Side Square Cylinders VIA PIV., EPJ Web of Conferences 25.
http://dx.doi.org/10.1051/epjconf/20122501064

Wang Z.J. & Zhou Y., (2005) Vortex interactions in a two side-by-side cylinder near-wake, International Journal of Heat and Fluid Flow, Vol 26, pp.362–377.
http://dx.doi.org/10.1016/j.ijheatfluidflow.2004.10.006

Shyam Kumar M.B. & Vengadesan S., (2010) A Study On The Influence Of Gap Ratio On Turbulent Flow Past Two Equal Sized Square Cylinders Placed Side-By-Side, The 37th National & 4th International Conference on Fluid Mechanics and Fluid Power December 16-18, 2010, IIT Madras, Chennai, India.
http://dx.doi.org/10.2514/6.1988-3718

Patil D.V. & Lakshmisha K.N., (2012) Two-dimensional flow past circular cylinders using finite volume lattice Boltzmann formulation, International Journal For Numerical Methods In Fluids Int. J. Numer. Meth. Fluids, Vol. 69, pp. 1149–1164.
http://dx.doi.org/10.1002/fld.2637

Iragashi Tamotsu & Shiba Yoshihiko, (2006) Drag Reduction for D-Shape and I-Shape Cylinder (Aerodynamic Mechanism of Reduction of Drag), JSME International Journal, Series B, Vol.49, No. 4, pp.1036-1042.
http://dx.doi.org/10.1299/jsmeb.49.1036

Lam K., Lin Y.F., Zou L. & Liu Y., (2012) Numerical Study of Flow Patterns and Force Characteristics for Square and Rectangular Cylinders With Wavy Surfaces, Journal of Fluids and Structures, Vol. 28, pp. 359-377.
http://dx.doi.org/10.1016/j.jfluidstructs.2011.11.006

Rowghani S., Mirzaei M. & Kamali R., (2010) Numerical Simulation of Fluid Flow Past a Square Cylinder Using a Lattice Boltzmann Method, Journal of Aerospace Science and Technology (JAST), Vol.7, No. 4, pp. 9-17.
http://dx.doi.org/10.1115/fedsm-icnmm2010-30482

Plint & Partner LTD Engineer, (1982) Manual Educational Wind Tunnel. England

Barata, J., Multiple Jet/Wall/Crossflow Interactions, (2014) International Review of Aerospace Engineering (IREASE), 7 (3), pp. 69-83.

Abdulwahid, A., Lazim, T., Saat, A., Jaafar, M., Kareem, Z., Experimental Thermal Field Measurements of Film Cooling with Twisted Holes, (2015) International Review of Aerospace Engineering (IREASE), 8 (3), pp. 86-94.
http://dx.doi.org/10.15866/irease.v8i3.6124

Rivas, G., Garcia, É., Assato, M., Numerical Simulation of Turbulent Forced Convection Coupled to Heat Conduction in Square Ducts, (2014) International Review of Mechanical Engineering (IREME), 8 (3), pp. 645-654.
http://dx.doi.org/10.15866/ireme.v8i3.1188


Refbacks

  • There are currently no refbacks.



Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2024 Praise Worthy Prize