Experimental investigation of heat transfer and aerodynamic drag of novel heat sinks with lamellar fins

• Autorzy: Terekh Aleksandr , Rudenko Aleksandr , Alekseik Yevhenii

Identyfikatory

DOI

10.24425/ather.2024.150438

• Języki publikacji: EN

Abstrakty

EN

Heat transfer and aerodynamic drag of novel small-sized heat sinks with lamellar fins, designed for electronic cooling, were experimentally investigated under conditions of forced convection in the range of Reynolds numbers 1 250-10 500. It was found that a gradual reduction in the fin spacing from 6 mm to 3 mm with a 29° angle of taper between the outermost fins leads to an increase in the heat transfer intensity by 15-32% with a significant increase in aerodynamic drag compared to the surface with a constant fin spacing of 6 mm. Incomplete cross-section cutting of fins at the relative depth of 0.6 in addition to the gradual reduction in the fin spacing provides aerodynamic drag decrease by 520% and increase of heat transfer intensity by 1820% in comparison with the similar heat sink without fins cutting. Proposed novel designs of heat sinks enabled us to decrease by 7°С–16°С the maximum overheating of the heat sink's base in the flow speed range from 2.5 m/s to 7.5 m/s at constant heat load. To ensure a constant value of maximum overheating of the heat sink base the inlet flow velocity for the surface with constant fin spacing should be 1.6-2 times higher than that for the heat sink with 29° taper angle between outermost fins and partially fins cutting. In this case, the aerodynamic drag for the latter will be higher only by 1.6-2.7 times, which is quite acceptable.

Słowa kluczowe

EN

heat sink; lamellar finning; electronic cooling; aerodynamic drag; heat transfer

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2024
• Tom: Vol. 45, no 1
• Strony: 53--63
• Opis fizyczny: Bibliogr. 30 poz., rys.

Twórcy

autor

Terekh Aleksandr

• National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Educational and Scientific Institute of Atomic and Thermal Energy, 37, Beresteisky Av., Kyiv, 03056, Ukraine

autor

Rudenko Aleksandr

• National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Educational and Scientific Institute of Atomic and Thermal Energy, 37, Beresteisky Av., Kyiv, 03056, Ukraine

autor

Alekseik Yevhenii

• National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Educational and Scientific Institute of Atomic and Thermal Energy, 37, Beresteisky Av., Kyiv, 03056, Ukraine

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