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- W2312912757 abstract "This paper is an investigation of the heat transfer and friction augmentation in the fullydeveloped portion of a narrow rectangular duct (AR=2) with wedge turbulators applied to the top and bottom walls. Tests are conducted at 10,000, 20,000, 30,000, and 40,000 Reynolds numbers based on the channel hydraulic diameter. The purpose of the paper is to find the overall thermal performance of four different wedge-shaped transport promoters, two symmetric and two non-symmetric wedges varying in height and footprint. Experimental setup consists of 40 segmented and individually heated copper blocks (10 for each wall) with temperature data measured with thermocouples embedded in each block on all four walls. Data reported includes the Nusselt number augmentation of the side walls of the channel in addition to the top and bottom featured walls to quantify the influence of flow disturbances caused by these wedge geometries to the surrounding smooth walls. Overall thermal performance is presented for each case to determine which wedge shape contributes to high heat transfer with a lower pressure loss. The non-symmetric (half) wedge shapes resulted in heat transfer augmentations 30% to 50% lower than the symmetric (full) wedge cases, and 20% to 50% lower friction factor augmentations. A better understanding of the effects produced by these geometries will help in the design and development of more effective cooling-channel design." @default.
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- W2312912757 date "2011-07-31" @default.
- W2312912757 modified "2023-09-26" @default.
- W2312912757 title "Comparison of Heat Transfer and Friction Augmentation for Symmetric and Non-Symmetric Wedge Turbulators on Two Opposite Walls" @default.
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- W2312912757 doi "https://doi.org/10.2514/6.2011-6021" @default.
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