每年出版 8 期
ISSN 打印: 1065-5131
ISSN 在线: 1563-5074
Indexed in
Heat Transfer Enhancement of Airflow in a Channel Using Corona Discharge
摘要
A numerical and experimental investigation was performed to study the effect of corona discharge on the flow field and heat transfer enhancement of airflow in a channel. The electric field was applied via a charged electrode situated at the centerline along the channel axis. The numerical approach was based on the Large-Eddy Simulation turbulence model to investigate the potential turbulence generated by the electric field and was applied to the fully-developed region. The experiments were performed in an earlier study and represent the data available to compare with the present computations. Thermal boundary condition was the uniform wall heat flux. In both numerical and experimental approaches, Reynolds number ranged from 500 to 2000, corona current 0.059 to 2.420 mA/m, and applied voltage −5.655 to −6.900 kV. The numerical results revealed the secondary flows in the cross-section of the channel. This corona-induced secondary flow was the main mechanism behind the enhanced heat transfer coefficients in both fully-developed and developing regions of the channel. The maximum heat transfer enhancement in the fully-developed flow was Nu/Nu0 = 3.4 for Re = 500−2000, while that in the developing flow was much smaller and ranged from 1.56 to 2.01.
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Haji Hosseinloo Ashkan, Tan Siow Pin, Yap Fook Fah, Toh Kok Chuan, Shock and vibration protection of submerged jet impingement cooling systems: Theory and experiment, Applied Thermal Engineering, 73, 1, 2014. Crossref
-
Lai F. C., Mathew J., Heat Transfer Enhancement by EHD-Induced Oscillatory Flows, Journal of Heat Transfer, 128, 9, 2006. Crossref
-
Grassi Walter, Testi Daniele, Heat Transfer Augmentation by Ion Injection in an Annular Duct, Journal of Heat Transfer, 128, 3, 2006. Crossref
-
Molki Majid, Damronglerd Piyasak, Electrohydrodynamic Enhancement of Heat Transfer for Developing Air Flow in Square Ducts, Heat Transfer Engineering, 27, 1, 2006. Crossref
-
Mazumder A. K. M. Monayem Hossain, Lai F. C., Enhancement in Gas Pumping in a Square Channel With Two-Stage Corona Wind Generator, IEEE Transactions on Industry Applications, 50, 4, 2014. Crossref
-
Goldstein R.J., Eckert E.R.G., Ibele W.E., Patankar S.V., Simon T.W., Kuehn T.H., Strykowski P.J., Tamma K.K., Bar-Cohen A., Heberlein J.V.R., Davidson J.H., Bischof J., Kulacki F.A., Kortshagen U., Garrick S., Heat transfer – a review of 2000 literature, International Journal of Heat and Mass Transfer, 45, 14, 2002. Crossref
-
Ould Ahmedou Sid'Ahmed, Havet Michel, Effect of process parameters on the EHD airflow, Journal of Electrostatics, 67, 2-3, 2009. Crossref
-
Molki Majid, Bhamidipati Kanthi Latha, Enhancement of convective heat transfer in the developing region of circular tubes using corona wind, International Journal of Heat and Mass Transfer, 47, 19-20, 2004. Crossref
-
Mazumder A.K.M. Monayem H., Lai Feng C., Effect of uneven applied voltages on the performance of a two-stage electrohydrodynamic gas pump, Journal of Electrostatics, 97, 2019. Crossref
-
Molki Majid, Harirchian Tannaz, Chitta Vijaya Lakshmi, An Improved Solution of Electrodynamics Equations for Corona Discharge Using Explicit Artificial Viscosity, Numerical Heat Transfer, Part B: Fundamentals, 50, 4, 2006. Crossref
-
Mazumder A.K.M.M.H., Lai F.C., Effect of grounded electrode size on a single stage EHD gas pump performance in a square channel, Journal of Electrostatics, 99, 2019. Crossref
-
Deylami H. M., Effects of EHD on the flow and heat transfer characteristics in a rectangular corrugated channel, Heat and Mass Transfer, 55, 12, 2019. Crossref
-
GRASSI W., TESTI D., Heat Transfer Enhancement by Electric Fields in Several Heat Exchange Regimes, Annals of the New York Academy of Sciences, 1077, 1, 2006. Crossref
-
Zhang Jianfei, Kong Lingjian, Qu Jingguo, Wang Shuang, Qu Zhiguo, Numerical and experimental investigation on configuration optimization of the large-size ionic wind pump, Energy, 171, 2019. Crossref