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BlogWe focus on high-tech research and development, energy-saving product design and production in the fields of fluid transportation (water pump, fan), fine control combustion, high-efficiency heat exchange and high-efficiency permanent magnet motor, and provide professional technical transformation services to provide users with professional comprehensive energy-saving solutions.
Enhanced Heat Transfer Technology of Ding-cell Structure
Release time:
2022-02-21
In the enhanced heat transfer technology, in order to enhance the flow heat transfer capacity, generally by destroying the boundary layer, reducing the thermal resistance of the boundary layer to improve heat transfer efficiency. However, for various heat transfer enhancement measures, not only the heat transfer enhancement performance should be paid attention to, but also its influence on the fluid flow resistance characteristics should be considered. The heat transfer characteristics and resistance characteristics are often a pair of contradictory quantities that need to be reconciled in the design of heat transfer equipment.
In the enhanced heat transfer technology, in order to enhance the flow heat transfer capacity, generally by destroying the boundary layer, reducing the thermal resistance of the boundary layer to improve heat transfer efficiency. However, for various heat transfer enhancement measures, not only the heat transfer enhancement performance should be paid attention to, but also its influence on the fluid flow resistance characteristics should be considered. The heat transfer characteristics and resistance characteristics are often a pair of contradictory quantities that need to be reconciled in the design of heat transfer equipment.
The Ding cell structure draws on the drag reduction characteristics of the golf spherical Ding cell, which can increase the heat transfer capacity while producing the smallest pressure drop loss, as shown in Figure 1.
Fig.1 Flow characteristics of air flowing through smooth ball and golf ball[1]
Kim and others[2]The heat transfer and flow resistance performance of impact, ribs and pits are compared under high Reynolds number, and it can be seen that compared with smooth wall, the heat transfer of impact is enhanced 4~6 times and the flow resistance is increased about 200 times; the heat transfer of ribs is enhanced 2~3 times and the flow resistance is increased 6~10 times; the heat transfer of Ding cell is enhanced 2~3 times and the flow resistance is increased 1~4 times, under the same fan power conditions, the comprehensive heat transfer performance Ding cell is the highest.
2 Efficiency of various strengthening measures[2]
References:
[1] "Numerical simulation and experimental study on heat transfer and flow resistance in the tube of Ding-cell type enhanced heat exchange tube" Chongqing University, 2013
[2] Kim W.K., Arellano L., Vardakas M.,Moon H. and Bunker R.S. comparison of trip-strip/impingement/dimple cooling concepts at high Reynolds number. ASME PaperNo.GT2003-38935
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