Experimental investigation of impingement heat transfer from a round rib-roughened surface

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Tarih

2017

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Yayıncı

Springer

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

An experimental investigation on impingement heat transfer from a rib-roughened surface is performed. Single, double, and triple rib configurations are tested. The rib is also located at three different positions for a single rib case. The Reynolds number is varied from 10,000 to 50,000 whereas the dimensionless jet-to-surface distance (z/D) is kept constant as 8. Results show that, the Nusselt number decreases just before a rib. After the rib, however, the Nusselt number decreases by a larger amount. Since ribs cause a reincreasing in the Nusselt number after the stagnation point and since the stagnation point Nusselt number is not affected by ribs, they can be used to enhance heat transfer especially for spot cooling applications. It is also obtained that using ribs is more useful for low speed impinging jets, when heat transfer from the whole surface is considered.

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Kaynak

Heat And Mass Transfer

WoS Q Değeri

Q3

Scopus Q Değeri

Q2

Cilt

53

Sayı

4

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