Numerical study on heat transfer and flow characteristics in double turning areas ribbed serpentine channel with lateral outflow

Bo lun Zhang, Hui ren Zhu, Tao Guo, Chun yi Yao, Zhong yi Fu

科研成果: 书/报告/会议事项章节会议稿件同行评审

1 引用 (Scopus)

摘要

The double turning areas ribbed serpentine channel with lateral outflow is an important structure for designing the internal systems of turbine blade. The current work similarly simplifies the internal channel of the real blade. The Nusselt number and pressure coefficient distribution of the double turning areas ribbed serpentine channel with different outflow ratios are numerically researched under static and rotating conditions. The Realizable k-ε turbulence model with enhanced wall treatment is used in the numerical simulation. The inlet Reynolds number is 11000. The rotation numbers vary from 0 to 0.09. Three outflow ratios are 27%/0%/73%, 27%/49%/24% and 27%/73%/0%, respectively. The rotation radius (R) is 46.4d. The result shows that the Nusselt number distribution of the passage 3 under 27%/49%/24% outflow ratio condition is similar to that under 27%/73%/0% outflow ratio condition. There is a large low Nusselt number area in the passage 3 under Dr=27%/0%/73% condition. The averaged area Nusselt number ratios on the suction side of the passage 1, passage 2 and passage 3 are higher than that on the pressure side under nonrotating condition. Rotation enhances heat transfer on the suction side of the passage 2, and has a positive effect on pressure side heat transfer of passage 1 and passage 3. The averaged area Nusselt number ratio of passage 3 under 27%/73%/0% outflow ratio condition is higher than that under other outflow ratio conditions. With the rotation number increasing, the pressure coefficient of the complete ribbed serpentine channel gradually increases, and the maximum increase is in the first turning area.

源语言英语
主期刊名Heat Transfer
出版商American Society of Mechanical Engineers (ASME)
ISBN(电子版)9780791858646
DOI
出版状态已出版 - 2019
活动ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019 - Phoenix, 美国
期限: 17 6月 201921 6月 2019

出版系列

姓名Proceedings of the ASME Turbo Expo
5A-2019

会议

会议ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019
国家/地区美国
Phoenix
时期17/06/1921/06/19

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