Numerical Investigation of Thermal-Hydraulic Performance of Circular and Non-Circular Tubes in Cross-Flow

A numerical study has been conducted to clarify flow and heat transfer characteristics around circular, cam, and drop-shaped tubes using the software package ANSYS FLUENT. Reynolds number Re based on equivalent circular tube is varied in range of (8.1--19.2)·10³. All tube shapes are investigated under similar operating conditions. Local heat transfer, pressure and friction coefficients over a surface of the tubes were presented. Obtained results agree well with those available in the literature. Correlations of the average Nusselt number Nu_av and a friction factor f in terms of Reynolds number for the studied tubes were proposed. The results indicated that Nu_av increases with increasing Re. In the contrary, f decreases as Re increases. Thermal-hydraulic performance is used to estimate the efficiency of the cam and drop-shaped tubes. Results show that the drop-shaped tube has the best thermal-hydraulic performance, which is about 1.6 and 2.5 times higher than that of the cam-shaped and circular tube, respectively

Литература

[1] Zukauskas A., Ulinskas R.V. Efficiency parameters of heat transfer in tube banks. Heat Transf. Eng., 1985, vol. 6, iss. 1, pp. 19--25. DOI: https://doi.org/10.1080/01457638508939614

[2] Zukauskas A. Heat transfer from tubes in cross-flow. Adv. Heat Transf., 1972, vol. 8, pp. 93--160. DOI: https://doi.org/10.1016/S0065-2717(08)70038-8

[3] Mittal S., Kumar V., Raghuvanshi A. Unsteady incompressible flows past two cylinders in tandem and staggered arrangements. Int. J. Numer. Methods Fluids, 1997, vol. 25, iss. 11, pp. 1315--1344. DOI: https://doi.org/10.1002/(SICI)1097-0363(19971215)25:11%3C1315::AID-FLD617%3E3.0.CO;2-P

[4] Roychowdhury G.D., Sarit K.D., Sundararajan T. Numerical simulation of laminar flow and heat transfer over banks of staggered cylinders. Int. J. Numer. Methods Fluids, 2002, vol. 39, iss. 1, pp. 23--40. DOI: https://doi.org/10.1002/fld.260

[5] Nishiyama H., Ota T., Matsuno T. Heat transfer and flow around elliptic cylinders in tandem arrangement. JASME Int. J. Ser. II, 1988, vol. 31, iss. 3, pp. 410--419. DOI: https://doi.org/10.1299/jsmeb1988.31.3_410

[6] Lavasani A.M., Bayat H., Maarefdoost T. Experimental study of convective heat transfer from in-line cam shaped tube bank in crossflow. Appl. Therm. Eng., 2014, vol. 65, iss. 1-2, pp. 85--93. DOI: https://doi.org/10.1016/j.applthermaleng.2013.12.078

[7] Merker G.P., Hanke H. Heat transfer and pressure drop on the shell-side of tube-banks having oval-shaped tubes. Int. J. Heat Mass Transfer, 1986, vol. 29, iss. 12, pp. 1903--1909. DOI: https://doi.org/10.1016/0017-9310(86)90008-6

[8] Horvat A., Leskovar M., Mavko B. Comparison of heat transfer conditions in tube bundle cross-flow for different tube shapes. Int. J. Heat Mass Transfer, 2006, vol. 49, iss. 5-6, pp. 1027--1038. DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2005.09.030

[9] Terekh A.M., Rudenko A.I., Zhukova Yu.V. Aerodynamic drag and visualization of the flow around single tubes of a drop-shaped form. Eng. Phys. Thermophy., 2013, vol. 86, no. 2, pp. 378--384. DOI: https://doi.org/10.1007/s10891-013-0844-9

[10] Sayed Ahmed S.A.E., Ibrahiem E.Z., Mesalhy O.M., et al. Heat transfer characteristics of staggered wing-shaped tubes bundle at different angles of attack. Heat Mass Transfer, 2014, vol. 50, no. 8, pp. 1091--1102. DOI: https://doi.org/10.1007/s00231-014-1323-3

[11] Sayed Ahmed S.A.E., Ibrahiem E.Z., Mesalhy O.M., et al. Effect of attack and cone angels on air flow characteristics for staggered wing-shaped tubes bundle. Heat Mass Transfer, 2015, vol. 51, no. 7, pp. 1001--1016. DOI: https://doi.org/10.1007/s00231-014-1473-3

[12] Deeb R., Sidenkov D.V. Investigation of flow characteristics for drop-shaped tubes bundle using ansys package. 2020 V Int. Conf. Inform. Tech. Eng. Education (Inforino), Moscow, Russia, 2020, pp. 1--5. DOI: https://doi.org/10.1109/Inforino48376.2020.9111775

[13] Deeb R., Sidenkov D.V. Numerical simulation of the heat transfer of staggered drop-shaped tubes bundle. J. Phys.: Conf. Ser., 2019, vol. 1359, art. 012135. DOI: https://doi.org/10.1088/1742-6596/1359/1/012135

[14] Jafari H.H., Dehkordi B.G. Numerical prediction of fluid-elastic instability in normal triangular tube bundles with multiple flexible circular cylinders. J. Fluids Eng., 2013, vol. 135, iss. 3, art. 031102.

[15] Priyank D.P., Karnav N.S., Kush V.M., et al. CFD analysis of heat exchanger over a staggered tube bank for different angle arrangement of tube bundles. IJERT, 2013, vol. 2, iss. 1, art. IJERTV2IS1445.

[16] Orszag S.A., Yakhot V., Flannery W.S., et al. Renormalization group modeling and turbulence simulations. Int. Conf. Near-Wall Turbulent Flows. Arizona, Tempe, 1993, pp. 1031--1046.

[17] Frank K. Principles of heat transfer. Stamford, Cengage Learning, 2011.

[18] Soe T.M., Khaing S.Y. Comparison of turbulence models for computational fluid dynamics simulation of wind flow on cluster of buildings in mandalay. IJERT, 2017, vol. 7, iss. 8, pp. 337--350. Available at: http://www.ijsrp.org/research-paper-0817.php?rp=P686711

[19] ANSYS FLUENT reference guide. Release 16.0. ANSYS, 2015.

[20] Tsvetkov F.F., Kerimov R.V., Velichko V.I. Zadachnik po teplomassoobmenu [Heat and mass transfer problem book]. Moscow, MPEI Publ., 2008.

[21] Promvonge P., Eiamsa-ard A.S. Heat transfer enhancement in a tube with combined conical-nozzle inserts and swirl generator. Energy Convers. Manage., 2006, vol. 47, iss. 18-19, pp. 2867--2882. DOI: https://doi.org/10.1016/j.enconman.2006.03.034

[22] Webb R.L. Performance evaluation criteria for use of enhanced heat transfer surfaces in heat exchanger design. Int. J. Heat Mass Transfer, 1981, vol. 24, iss. 4, pp. 715--726. DOI: https://doi.org/10.1016/0017-9310(81)90015-6