摘要
在现代低展弦比燃气透平设计中,端壁的换热与冷却问题随着透平进口温度的不断提高已经变得至关重要。综述了国内外有关透平端壁气动、换热与冷却方面的研究进展,特别展示了端壁冷却研究领域一些最新的典型研究成果,并基于目前的研究发展趋势指出:在端壁的换热与冷却技术研究领域,新型气膜孔和端壁的改型设计将得到进一步的研究;兼顾端壁换热冷却和气动性能的多目标多学科优化问题将是一个具有挑战性的研究重点;此外端壁的复合冷却技术及其相关的流热耦合换热研究将为端壁的高效冷却设计提供重要支撑。
With the inlet temperature increasing, the gas turbine endwall heat transfer and cooling technology has become significantly important in a modern gas turbine with low aspect ratio. It is reviewed on the research progress in endwall aerodynamics, heat transfer and cooling techniques, especially including some representative research achievements. According to the current interests in this field, the future development orientation and research objectives are suggested with emphasis on new shaped cooling holes and endwall redesign. Multi-objective and multi-disciplinary optimizing ~or endwall heat transfer, cooling and aerodynamics should be a key problem with great challenge. Additionally, much more research should be conducted on combined cooling technology and numerical methodology of conjugate heat transfer to be responsible for technical support for high effective cooling design on endwall.
出处
《热力透平》
2014年第2期85-93,106,共10页
Thermal Turbine
基金
高等学校博士学科点专项科研基金资助(20130201120060)
关键词
燃气透平叶片
端壁换热冷却
二次流
泄漏流
非轴对称端壁
gas turbine blades
endwall heat transfer and cooling
secondary flow
purge flow
nonaxisymmetric endwall
