叶身前缘构型控制跨声速压气机前缘分离流动的机制探索

项目名称： 叶身前缘构型控制跨声速压气机前缘分离流动的机制探索

项目编号： No.51506020

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 杨凌

作者单位： 上海海事大学

项目金额： 21万元

中文摘要： 叶片前缘形状对于压气机气动性能具有非常重要的影响，前缘曲率变化导致吸力峰的形成，从而在前缘形成分离泡。合理的压气机叶片前缘构型，可控制前缘分离泡的形成和发展，有利于叶片的附面层发展，是改善压气机内流场结构、减少损失、拓宽稳定工作范围的一项有效手段。但由于结构位置特殊，目前国内外对前缘构型开展的工作较少，其控制压气机前缘分离流动机理还不清晰，因此，开展本申请项目的研究，对改善压气机性能具有特别重要的现实意义。本项目拟采用理论分析 、数值模拟和实验研究相结合的方法，开展跨声速压气机叶身前缘构型方法研究。在保证叶顶和叶根附近叶型不变的前提下，对叶身中部前缘进行凹陷处理，揭示叶身前缘构型抑制前缘分离流动的内在机理，探求前缘与叶型、叶身联合设计的理论方法及优化策略，为跨声速压气机的性能提高和深入研究提供科学依据。

中文关键词： 跨声速压气机；压气机叶栅；前缘；分离流动；设计方法

英文摘要： The shape of blade leading edge has a very significant impact on compressor performance, and the curvature change of the leading edge leads to suction peak and the formation of leading edge separation bubble. Reasonable compressor blade leading edge treatment will help to control the whole blade boundary layer development and the formation and development of leading edge separation bubble, improve the structure of flow field inside the compressor, reduce losses, and expand the range of compressor stability. However, due to the special structure, less work has been undertaken on the leading edge configuration. Therefore, carrying out related research timely to improve the compressor performance has a particularly important practical significance. The project intends to use the combination of methods of theoretical analysis, numerical simulation and experiments to study the configuration method on the blade leading edge in transonic compressor. The leading edge at the tip and the root of the blade keeps unchanged, but the leading edge depression near the central part of the blade is used. The inherent mechanism of the leading edge configuration inhabiting the leading edge flow separation will be revealed. The combined design and optimized strategies of the leading edge, the airfoil profile and the blade will be explored, a scientific basis for improving transonic compressor performance and in-depth research will be provided.

英文关键词： transonic compressor ;compressor cascade;leading edge; separation flow;design method