Numerical study on flow and heat transfer characteristics of discrete film cooling holes of the sinusoidal longitudinal corrugated heat liner

Zhi peng Xu, Hui ren Zhu, Ya zhou Wang, Xinyu Bian

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

To understand film cooling flow fields and heat transfer characteristics of the longitudinal corrugated surface on afterburner heat liner, the numerical simulation was performed in approximate actual boundary conditions. The single hole and full film holes on the corrugated surface were investigated under different boundary conditions to study the heat transfer and discharge coefficient. The adverse pressure gradient on the leeward results in spanwise expansion of the airflow, while the favorable pressure gradient on the windward keeps the shape of the jet constant. The different hole spacing and hole row spacing in different positions of the corrugated surface should be considered due to the film covering characteristics. The film cooling holes at the same height on the leeward and windward share the similar laterally average effectiveness. The flow rate and discharge coefficient increase from crest to trough. Cross-flow has a negative influence on the discharge coefficient especially the inlet cross-flow. The cross-flow and discharge coefficient can be correlated with each other by a logarithmic function. The jet discharge coefficient on the windward surface is higher than that on the leeward surface, which is contrary to previous cognition. The reason is that the jet blocking causes the downstream pressure zone to advance, which counteracts and enhanced the siphon effect on the leeward and windward side respectively. As the inlet pressure of coolant increases, the film cooling effectiveness on the windward side is greatly improved in full film condition. However, it changes little on the leeward side.

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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