An experimental investigation of drags in straight slitlike channels with ordered systems of spherical dimples

Anurov, Yu. M.; Andreev, Konstantin; Polishchuk, V. G.; Rassokhin, V. A.; Sokolov, N. P.

doi:10.1134/s0040601507070105

Cited by 1 publication

(2 citation statements)

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“…Such a situation may for example occur when the steam is overheated by convection or condensation medium with higher temperature or convective cooling gaseous fluid. In order to describe more specifically the positive features of the proposed approach to the heat exchanger efficiency improvement, we use primarily a unique experimental material to study the flat dimpled channels obtained in [17][18][19]. It allows to perform rather convincing preliminary evaluations of the PTHE effectiveness with continuous dimpled fins for which we use the abbreviation PTHED.…”

Section: Several Specific Considerations For Proposed Direction Of Womentioning

confidence: 99%

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Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

Gotovsky¹,

Kolpakov²,

Mikhailov³

et al. 2017

IJHT

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To date, accumulated large amount of experimental and theoretical data on the thermal hydraulics dimpled surfaces that demonstrate their high efficiency. However, the extent of the use of these surfaces in the industry far below their potential. This paper discusses the idea of using these surfaces to increase the efficiency of heat exchangers with a high coefficient of fins (e.g., air coolers). This makes it possible to achieve good results with minimal pressure loss increase and admit to widen practical use of such artificial roughness. Importantly, these reliefs provide heat transfer enhancement both on the side with dimples and on the side with protrusions. Most practically suitable for industrial implementation are tube-and-plate heat exchangers with continuous fins and new type of finned tubes − flat-oval tubes with partial finning. When using plane fins with dimples we can substantially increase efficiency if heat transfer intensity on shell side is not high. So we can bring the level of compactness of shell-and-tube heat exchangers up to values characteristic for the plate heat exchangers. Results of calculations showed a possibility of efficiency increase due to dimples to 60-70%.

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Section: Several Specific Considerations For Proposed Direction Of Womentioning

confidence: 99%

“…[17] was set. When two dimpled surfaces of flat channel are situated too close to each other heat transfer intensity begins to fall.…”

Section: Several Specific Considerations For Proposed Direction Of Womentioning

confidence: 99%

Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

Gotovsky¹,

Kolpakov²,

Mikhailov³

et al. 2017

IJHT

View full text Add to dashboard Cite

show abstract

An experimental investigation of drags in straight slitlike channels with ordered systems of spherical dimples

Cited by 1 publication

References 1 publication

Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

Ways of dimpling use for efficiency improvement of shell and tube heat exchangers with finned tubes

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