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- W2355254198 abstract "Based on the single blow transient technique,experimental research on the performance of heat transfer and drag characteristics for self-designed three types of test piece with corrugated-undulated(CU) primary surfaces was conducted.A mathematical model was established,and the functional relations between outlet temperature and time and number of heat transfer units(NTU) were obtained by numerical solution.The value of NTU under testing condition was obtained by a matching method.Within the normal range of Re=200～1200 for the compact recuperator,the correlations of heat transfer factor j and friction factor f for three types of CU surface were obtained.The equivalent diameter of heat transfer surface is only from 1.35 to 1.48 mm,belonging to mini scale,and with alternate angle of 52.5°～67.5°.Performance analysis was made for three types of heat transfer surfaces based on the comprehensive evaluating index j/f.Results show that number one test piece has good comprehensive performance.By error analyzing,the regressive errors of correlations were less than 16% with sufficient engineering accuracy." @default.
- W2355254198 created "2016-06-24" @default.
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- W2355254198 date "2009-01-01" @default.
- W2355254198 modified "2023-09-23" @default.
- W2355254198 title "Performance of Heat Transfer and Drag Characteristics for Recuperator with Corrugated-Undulated Primary Surfaces" @default.
- W2355254198 hasPublicationYear "2009" @default.
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