2023
DOI: 10.55164/ajstr.v26i1.248061
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Experimental Study on Convective Heat Transfer and Pressure Drop Characteristics of an Alternating Cross-Section Flattened Tube with Different Twist Angle

Abstract: In this research, the heat transfer coefficient (HTC) and pressure drop of alternating cross-section flattened (ACF) tubes were investigated experimentally and compared with the same parameters of a circular tube. Three different ACF tubes were fabricated from circular copper tubing with an internal diameter of 4.5 mm, a thickness of 1 mm, and a length of 400 mm. The twist angles were 30, 45, and 90°. The experimental ranges covered a mass flux of 729–1,434 kg/m2s and a heat flux of 12–30 kW/m2. The results sh… Show more

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