燃气轮机透平动叶横流带肋通道中气膜冷却研究进展
摘要：目的 燃气轮机透平进口温度已经远超叶片材料的许用温度，发展更加高效的透平冷却技术，尤其是气膜冷却技术至关重要。在透平动叶中部区域的气膜冷却通常由横流带肋通道供应，因此对近年来横流带肋通道中气膜冷却研究进展进行了综述。 方法 介绍了不同冷气供应方式下气膜冷却性能的差异，归纳了肋片角度、肋片形式、气膜孔与肋片的相对位置、横流通道进口雷诺数对流动和气膜冷却性能的影响，总结了针对横流带肋冷气条件下气膜孔型设计的研究进展。 结果 横流带肋通道内部冷却结构和横流通道进口雷诺数对气膜冷却性能影响显著，横流进气改变了孔出口下游的冷却效率分布，同时孔进口处流动受气膜孔与肋片的相对位置及雷诺数变化的影响。展向非对称气膜孔型和对横流进气不敏感的气膜孔型可有效提升气膜冷却性能。 结论 为进一步推动横流带肋通道气膜冷却技术的发展，建议深入研究各影响因素与气膜冷却性能之间的关系，并对适用于横流带肋进气的专用气膜孔型进行优化设计。
Abstract:Objectives The inlet temperature of gas turbine has far exceeded the allowable temperature of the blade material, so it is very important to develop more efficient turbine cooling technology, especially the film cooling technology. The film cooling in the central region of the turbine blade is usually supplied by the crossflow ribbed passage. Therefore, the research progress of the film cooling in the crossflow ribbed passage in recent years was reviewed. Methods The variations in film cooling performance under different coolant supply modes were introduced. The impacts of rib angle, rib shape, relative position of film holes and ribs, and Reynolds number at the inlet of the crossflow channel on flow and film cooling performance were summarized. The research progress of film cooling hole shape design under the condition of crossflow ribbed cooling air was concluded. Results The internal cooling structures within the crossflow ribbed passage and the Reynolds number at the entrance of the crossflow channel exert significant influences on film cooling performance, while the distribution of cooling effectiveness at the hole outlet downstream is altered during crossflow intake. Moreover, the flow at the hole entrance is influenced by both the relative position of the hole and rib as well as changes in Reynolds number. The asymmetrical spanwise cooling hole and the hole insensitive to the crossflow can enhance the film cooling performance. Conclusions In order to further promote the development of film cooling technology in the crossflow ribbed passage, it is recommended to thoroughly study the relationship between film cooling performance and all influencing factors, and to optimize the design of special film cooling hole suitable for crossflow ribbed inlet.
标题：燃气轮机透平动叶横流带肋通道中气膜冷却研究进展
title:Research Progress on Film Cooling Fed by Crossflow Ribbed Passage of Gas Turbine Blades
作者：张超, 张海川, 付经伦, 童志庭, 朱俊强
authors:Chao ZHANG, Haichuan ZHANG, Jinglun FU, Zhiting TONG, Junqiang ZHU
关键词：燃气轮机,气膜冷却,透平冷却,带肋通道,透平叶片,肋片,叶片冷却,冷却效率,
keywords:gas turbine,film cooling,turbine cooling,ribbed passage,turbine blade,rib,blade cooling,cooling efficiency,
发表日期：2024-10-31
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