【摘要】 加工偏差会使得叶型实际型面偏离理论设计型面,导致叶型的气动性能与理论结果相偏离。由于高速叶型尺寸小、来流马赫数高,不利于几何偏差的精确复现和精细化实验测量,提出了采用低速模拟的方法进行几何偏差影响研究的新方法。在低速模拟技术的基础上,叠加从实际叶型中提取的四中典型偏差模态,通过数值模拟研究方法,对比研究了不同偏差模态在高速原型和低速模拟大尺寸叶型上对叶型气动性能影响的机理,验证了采用低速模拟技术研究加工偏差影响的可靠性。同时,通过数值模拟分析不同偏差形式对叶型气动特性和叶表附面层发展规律的影响,探讨了不同加工偏差模态的影响机理。更多还原

【Abstract】 Due to the existence of the manufacturing deviation, compressor blades will deviate from the designing profile, thus affecting the aerodynamic performance of the blades. High pressure compressor blades usually are small with high Mach number and manufacturing deviation is asked to be tiny, which makes it harder to do accurately experimental measurement. This paper proposes the methods of the low-speed simulation for new methods to study the impact of geometric deviation on blades. On the basis of low-speed simulation technology, the four typical geometric deviation modes extracted from the actual blades are superimposed, studying the mechanism of the influence of different modes on the aerodynamic performance of the high-speed blades and low-speed blades by means of the cascade test and the numerical simulation method. The reliability of this new method is verified by comparing influence of the machining deviation between high-speed blades and low-speed blades. At the same time, the influence of different, deviation modes on the aerodynamic characteristics of blades and the development of the boundary layer of blades is studied through numerical simulation, and the influence mechanism of different machining deviation modes is discussed.更多还原