NUMERICAL INVESTIGATION ON MITIGATION OF HEAT TRANSFER DETERIORATION OF SUPERCRITICAL CO2FLOW BY INTRODUCING MULTIPLE TURBULATORS ALONG HELICES IN A CIRCULAR TUBE

Hangfei Duan, Gongnan Xie, Yuan Ma, Shulei Li

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

In order to effectively alleviate the heat transfer deterioration phenomenon of supercritical CO2 (S-CO2) in a vertical circular tube, explores the fluid hydraulic and thermal performance of multiple turbulator distributed along helices through a verified standard k-ω model. The effects of the pitch and the height of turbulators on flow characteristic and heat transfer are observed and analyzed in detail. With the increase of the height of turbulators, the heat transfer coefficient increases significantly. Besides, as the pitch decreases, the fluid re-circulation area behind each turbulator decreases, resulting in stronger mixing of swirling flow, which enhances turbulent kinetic energy of downstream fluid and weakens buoyancy force, thus mitigating heat transfer deterioration. The present results suggest that introducing multiple turbulators distributed along helices into circular tube can be a beneficial way to alleviate heat transfer deterioration and to enhance heat transfer of supercritical CO2 flow.

源语言英语
主期刊名Supercritical CO2
出版商American Society of Mechanical Engineers (ASME)
ISBN(电子版)9780791886083
DOI
出版状态已出版 - 2022
活动ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022 - Rotterdam, 荷兰
期限: 13 6月 202217 6月 2022

出版系列

姓名Proceedings of the ASME Turbo Expo
9

会议

会议ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022
国家/地区荷兰
Rotterdam
时期13/06/2217/06/22

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