Erscheint 18 Ausgaben pro Jahr
ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561
Indexed in
Numerical Simulation of Vortex Heat Transfer Enhancement in Transformer Oil Flow in a Channel with One-Row Spherical Dimples
ABSTRAKT
Convective heat transfer in laminar flow of transformer oil in a narrow channel (2 × 0.5 cross section) with vortex generators shaped as spherical dimples with a depth of 0.2 (in fractions of dimple spot diameter) placed at a heated wall surface is calculated using computational multiblock technologies for solution of the Navier−Stokes and energy equations within the framework of the generalized pressure correction procedure. Based on the comparison of channels with 15 and 121 dimples and a periodic module subject to periodic boundary conditions, vortex heat transfer enhancement is analyzed in comparison with a smooth channel without dimples and approximately fivefold heat transfer enhancement is validated.
-
Isaev S. A., Baranov P. A., Zhukova Yu. A. V., Usachov A. E., Analysis of the Influence of the Temperature Factor on the Intensification of the Heat Exchange in a Lane Bank of Round Tubes in the Case of Laminar Oil Flow about It, Journal of Engineering Physics and Thermophysics, 86, 6, 2013. Crossref
-
Isaev S. A., Leontiev A. I., Gotovskii M. A., Usachov A. E., Zhukova Yu. V., Analysis of thermohydraulic efficiency increase during transformer oil flow in a minichannel with a single-row package of spherical and oval dimples at a heated wall, High Temperature, 51, 6, 2013. Crossref
-
Burtsev S. A., Leontiev A. I., Study of the influence of dissipative effects on the temperature stratification in gas flows (Review), High Temperature, 52, 2, 2014. Crossref
-
Isaev S. A., Baranov P. A., Zhukova Yu. V., Sudakov A. G., Enhancement of heat transfer in unsteady laminar oil flow past a heated cylinder at Re = 150, Thermophysics and Aeromechanics, 21, 5, 2014. Crossref
-
Isaev S. A., Zhukova Yu. V., Malyshkin D. A., Numerical Simulation of the Convective Heat Exchange in the Separation air and Oil Flows in a Staggered Bank of Round Tubes in a Wide Range of Change in the Reynolds Number, Journal of Engineering Physics and Thermophysics, 88, 4, 2015. Crossref
-
Isaev S. A., Leontiev A. I., Kornev N. V., Hassel E., Chudnovskii Ya. P., Heat transfer intensification for laminar and turbulent flows in a narrow channel with one-row oval dimples, High Temperature, 53, 3, 2015. Crossref
-
Isaev S. A., Zhukova Yu. V., Baranov P. A., Sudakov A. G., Numerical investigation of the effect of roughness on convective heat transfer under stationary laminar flow of M20 oil around a circular cylinder, High Temperature, 53, 5, 2015. Crossref
-
Tsynaeva A.A., Nikitin M.N., Study of the Flow in a Channel with Dumbbell-Shaped Dimples, Procedia Engineering, 150, 2016. Crossref
-
Isaev S. A., Leont’ev A. I., Mil’man O. O., Sudakov A. G., Usachov A. E., Gul’tsova M. E., Intensification of Heat Exchange in Laminar Vortex Air Flow in a Narrow Channel with a Row of Inclined Oval Trenches, Journal of Engineering Physics and Thermophysics, 91, 4, 2018. Crossref
-
Rashidi Saman, Hormozi Faramarz, Sundén Bengt, Mahian Omid, Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications, Applied Energy, 250, 2019. Crossref
-
Isaev S.A., Leontiev A.I., Milman O.O., Popov I.A., Sudakov A.G., Influence of the depth of single-row oval-trench dimples inclined to laminar air flow on heat transfer enhancement in a narrow micro-channel, International Journal of Heat and Mass Transfer, 134, 2019. Crossref
-
Isaev S. A., Chornyi A. D., Zhukova Yu. V., Vysotskaya A. A., Kharchenko V. B., Vortex Intensification of Heat Transfer in Channels and Pipes with Periodic Elements of Discrete Roughness, Journal of Engineering Physics and Thermophysics, 92, 6, 2019. Crossref
-
Isaev S. A., Sudakov A. G., Chornyi A. D., Zhukova Yu. V., Usachov A. E., Heat Transfer Enhancement in a Microtube with an In-Line Package of Spherical and Inclined Oval-Trench Dimples during Transformer-Oil Pumping, High Temperature, 57, 6, 2019. Crossref