{"title":"The Effect of Angle of Attack on Pressure Drag from a Cam Shaped Tube","authors":"Arash Mir Abdolah Lavasani","volume":49,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":28,"pagesEnd":33,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/7729","abstract":"
The pressure drag from a cam shaped tube in cross flows have been investigated experimentally using pressure distribution measurement. The range of angle of attack and Reynolds number based on an equivalent circular tube are within 0≤α≤360° and 2×104< Reeq < 3.4 ×104, respectively. It is found that the pressure drag coefficient is at its highest at α=90° and 270° over the whole range of Reynolds number. Results show that the pressure drag coefficient of the cam shaped tube is lower than that of circular tube with the same surface area for more of the angles of attack. Furthermore, effects of the diameter ratio and finite length of the cam shaped tube upon the pressure drag coefficient are discussed.<\/p>\r\n","references":"[1] T. Ota, S.Aibaa, T.Tsuruta and M.Kaga, \"Forced Convection Heat\r\nTransfer from an Elliptic Cylinder of Axis Ratio 1:2,\" Bulletin of JSME,\r\nVol.26, no.212,1983, pp.262-267.\r\n[2] G. P.Merker and H.Hanke, \"Heat transfer and pressure drop on the\r\nshell-side of tube-banks having oval-shaped tubes,\" International\r\nJournal of Heat and Mass Transfer, Vol.29, no.12, 1986, pp.1903-1909.\r\n[3] T.Ota and H.Nishiyama, \"Flow around two elliptic cylinders in tandem\r\narrangement,\" Journal of Fluids Engineering, Transactions of the\r\nASME, Vol.108, no.1, 1986, pp.98-103.\r\n[4] B.V.S.S.S.Prasad, A.A.Tawfek and V.R.M.Rao, \"Heat Transfer from\r\nAerofoils in Cross-Flow,\" International Communications in Heat and\r\nMass Transfer, Vol.19, 1992, pp.870-890.\r\n[5] H. M. Badr, \"Force convection from a straight elliptical tube,\" Journal\r\nof Heat and Mass Transfer, Vol.34, 1998, pp.229-236.\r\n[6] A.Hasan, , Sir\u00e9n, K., \"Performance investigation of plain circular and\r\noval tube evaporatively-cooled heat exchangers\", Applied Thermal\r\nEngineering, Vol.24, 2004, pp.777-790.\r\n[7] R.S.Matos, T.A.Laursen, J.V.C.Vargas and A.Bejan, \"Threedimensional\r\noptimization of staggered finned circular and elliptic tubes\r\nin forced convection,\" International Journal of Thermal Sciences, Vol.\r\n43, 2004, pp.477-487.\r\n[8] D.Bouris, E.Konstantinidis, S.Balabani, D.Castiglia, and G.ergeles,\r\n\"Design of a novel, intensified heat exchanger for reduced fouling\r\nrates,\" International Journal of Heat and Mass Transfer, Vol.48, 2005\r\npp.3817-3832.\r\n[9] F.White, Fluid Mechanics, Mc Graw-Hill, New York, 2005. ","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 49, 2011"}