Aerothermal performances improvement by novel stepped zebra-ribs in two-pass channel

Shyy Woei Chang, Pey Shey Wu, Yong En Lu, Chi An Chen

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)


The novel stepped zebra-ribs (SZR) are invented for improving the aerothermal performance of a channel flow. The measured endwall Nusselt number map, Fanning friction factor, and aerothermal performance index for the enhanced two-pass channel are correlatively examined with the flow structures predicted by ANSYS code. The heat transfer enhancement (HTE) mechanisms generated by the stepped zebra-ribs, which are characterized as scrolling sectional vortices, periodically broken boundary layers, and turbulence promotions act together to significantly promote the HTE effectiveness. At the Reynolds numbers between 5000 and 15,000, the area-average Nusselt numbers and Fanning friction factors over the ribbed endwall are respectively raised to 5.97–4.9 Dittus-Boelter (D–B) references and 13–9.6 times of Blasius eq. (B-E) levels to give rise to the outstanding API values of 2.65–2.39. The heat-transfer and pressure-drop correlations of the two-pass channel with the SZR are devised to assist the relevant applications.

期刊International Communications in Heat and Mass Transfer
出版狀態Published - 2023 3月

All Science Journal Classification (ASJC) codes

  • 原子與分子物理與光學
  • 化學工程 (全部)
  • 凝聚態物理學


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