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Experimental Investigation on Effects of Trapezoidal Ribs on Heat Transfer Enhancement with Electrohydrodynamics Active Method into Duct | ||
| AUT Journal of Mechanical Engineering | ||
| مقاله 6، دوره 4، شماره 4، اسفند 2020، صفحه 493-504 اصل مقاله (1.4 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajme.2020.16725.5840 | ||
| نویسنده | ||
| Amin Alami nia* | ||
| دانشگاه شهیدمدنی آذربایجان-تبریز | ||
| چکیده | ||
| In this work, the heat transfer enhancement of trapezoidal ribs is investigated. Cooling of the three trapezoidal ribs has been achieved with electrohydrodynamicsactive method by experimental apparatus. The hydrodynamic and heat transfer behavior of air flow was studied by electrohydrodynamics active method. The aim of the present work is heat transfer enhancement with low pressure loss. In active method, two arrangements of wire electrodes have been applied. The results show that in the same Reynolds numbers and voltages of wire electrodes, the heat transfer was increased in arrangement 1 than arrangement 2. Density of electric charge around wire electrodes in arrangement 1 is higher than in arrangement 2. Therefore, arrangement 1 is better than arrangement 2. Arrangements 1 and 2 are different with the position of wire electrodes. With attention to results the power of corona wind in low Reynolds flows is higher than in high Reynolds flows, signifying that the corona wind in low Reynolds numbers is better than in high Reynolds numbers. In the same Reynolds numbers and voltages of wires, the average performance evaluation criteria were increased in arrangement 2 than arrangement 1. | ||
| کلیدواژهها | ||
| Enhancement؛ Convection؛ Electrohydrodynamics؛ Ribs؛ Corona wind | ||
| مراجع | ||
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[1] A. Alamgholilou (Alami nia), E. Esmaeilzadeh, Experimental Investigation on Hydrodynamics and Heat Transfer of Fluid Flow into Channel for Cooling of Rectangular Ribs by Passive and EHD Active Enhancement Methods, Experimental Thermal and Fluid Science, 38 (2012) 61-73. [2] A. Alamgholilou (Alami nia), E. Esmaeilzadeh, Numerical Investigation on Effects of Secondary Flow into Duct for Cooling of the Ribs by Passive Enhancement Method, Enhanced Heat Transfer 19(3) (2008) 233-248. [3] E. Esmaeilzadeh, A. Alamgholilou (Alami nia), Numerical Investigation of Heat Transfer Enhancement of Rectangular Ribs with Constant Heat Flux located in the floor of a 3D duct flow, Asian Journal of Applied Sciences, 1(4) (2008) 286-303. [4] A. Alami nia, A. Campo, Experimental Investigation on Flow and Heat Transfer for Cooling Flush-Mounted Ribbons in a Channel-Application of an Electrohydrodynamics Active Enhancement Method, Thermal Science, 20(2) (2016) 505-516. [5] A. Alami nia, A. Campo, Experimental study on EHD heat transfer enhancement from flush-mounted ribbons with different arrangements of wire electrodes in a channel, Heat Mass Transfer, 52 (2016) 2823-2831. [6] A. Alami nia, T. Kheiri, M. Jafari, Experimental Study on Electrohydrodynamic Heat Transfer Enhancement of Semicircular Ribs into Channel, Thermal Science, 23(2A) (2019) 497-508. [7] M. Peng, T.H. Wang, X.D. Wang, Effect of longitudinal electrode arrangement on EHD-induced heat transfer enhancement in a rectangular channel, International Journal of Heat and Mass Transfer,93 (2016) 1072–1081. [8] W. J. Sheu, J.J. Hsiao, C.C. Wang, Effect of oscillatory EHD on the heat transfer performance of a flat plate, International Journal of Heat and Mass Transfer, 61 (2013) 419–424. [9] H. M. Deylami, N. Amanifard, F. Dolati, R. Kouhikamali, K. Mostajiri, Numerical investigation of using various electrode arrangements for amplifying the EHD enhanced heat transfer in a smooth channel, Journal of Electrostatics, 71 (2013) 656-665. [10] H. Fujishima, Y. Morita, M. Okubo, T. Yamamoto, Numerical Simulation of Three-dimensional EHD of Spiked-Electrode Electrostatic Precipitators, IEEE, 13(1) (2006) 160-167. [11] M. M. Ohadi, D.A. Nelson, S. Zia, Heat Transfer Enhancement of Laminar and Turbulent Pipe Flow via Corona Discharge, Int. Journal of Heat and Mass Transfer, 34 (1991) 1175-1187. [12] N. F. Homologuee, Mesure De Debit Des Fluids Au Moyen De Diaphrams, NF X 10-102, (1971). [13] J. H. Goo, J.W. Le, Stochastic Simulation of Particle Charging and Collection Characteristics for Wire-Plate Electrostatic Precipitator of Short Length, Aerosol Science, 28(5) (1997) 875-893. [14] R. J. Moffat, Describing the Uncertainties in Exp. Results, Exp. Thermal & Fluid Science, 1 (1988) 3-17. | ||
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