针板结构冷却特性实验

张斌; 朱惠人; 蔡毅; 许都纯

针板结构冷却特性实验

西北工业大学动力与能源学院,西安 710072

基金项目: 国家重点基础研究发展计划(2007CB707701)

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出版历程
- 收稿日期: 2009-12-09
- 修回日期: 2010-05-24
- 刊出日期: 2011-02-28

Experimental investigation of cooling effectiveness of spiculate lamilloy

School of Power and Energy, Northwestern Polytechnical University,Xian 710072,China

摘要

摘要: 在已研究放大型针板内表面换热特性的基础上,在大尺寸低速回流风洞内,实验研究了5套真实尺寸针板实验件的整体冷却效果.研究结果表明:针板具有很好的冷却效果,孔间距与气膜孔径对冷却效果有很大影响,孔间距越小,气膜孔径越大冷却效果越好;扰流柱直径的变化对针板冷却效果影响较小;当吹风比一定时,主流速度的变化对针板冷却效果影响亦比较小,吹风比是影响气膜冷却效果的根本原因.
- 燃烧室 /
- 针板 /
- 扰流柱 /
- 冷却效果 /
- 吹风比
Abstract: Five true scale spiculate lamilloys were studied to analyze the cooling effectiveness based on the former inner surfaces heat transfer characteristics,and an experiment was tested in a large-scale,low-speed close-looped wind tunnel.The result shows that very high cooling effectiveness can be achieved by using spiculate lamilloy.The ratio of hole pitch to impingement hole diameter(S/D) and the diameter of film hole (D_out) play important roles in determining the cooling effectiveness,the smaller S/D or larger D_out means higher cooling effectiveness.The pin diameter (D_pin) has little influence on cooling effectiveness.When blowing ratio is constant,the gas velocity also has little influence on cooling effectiveness,while blowing ratio is a major influential factor to film cooling effectiveness.
- combustor /
- spiculate lamilloy /
- pin /
- cooling effectiveness /
- blowing ratio

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参考文献(12)

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