附面层吸除抑制压气机内流动分离的机制及控制策略优化研究

项目名称： 附面层吸除抑制压气机内流动分离的机制及控制策略优化研究

项目编号： No.51206035

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 陈绍文

作者单位： 哈尔滨工业大学

项目金额： 25万元

中文摘要： 本项目针对高负荷压气机设计中面临的因大尺度分离而导致的流动失稳问题，将主动流动控制技术- - 附面层吸除应用其中，以达到有效抑制或者削弱流道内复杂三维流动分离的目的，从而提升其气动性能和工作指标。项目提出在动、静叶以及端壁表面综合利用吸气孔和吸气槽的流动控制策略优化方法，采用常规的气动性能研究评价方法与拓扑理论和涡动力学知识相结合的思路，通过三维数值模拟分析方法和实验验证手段，初步建立了具有三维成型复杂外形叶片的叶栅流道内采用附面层吸除的设计理论和控制策略，进一步揭示了复杂三维分离流动得到有效控制的机理，以及附面层吸除控制附面层内低能流体再分配和有效吸除的内流机制，完善了高负荷吸附式压气机的设计理论基础，不仅能够为我国相关技术的形成与发展提供理论技术储备，而且具有实用的近期工程应用价值。

中文关键词： 高负荷压气机；流动控制；附面层吸除；流动分离；气动性能

英文摘要： As one of the active flow control methods, boundary layer suction was implemented via the hole/slot on the blade surface and end-wall of a highly-loaded compressor in order to effectively suppressing or weakening the three-dimensional flow separation and enhancing aerodynamic performance and stability. Comprehensive utilization of the suction hole and slot trough flow control strategy optimization in the surfaces of rotor, stator and end-wall was proposed. By the three-dimensional numerical simulation methods and experimental validation of means, and combined conventional aerodynamic performance evaluation method with topological theory and vortex dynamics, the essential design theory and control strategy for boundary layer suction applying in the compressor cascade with three-dimensional complex shape blade were initially established.The mechanismsforeffectively controlling the complex three-dimensional flow separationand redistribution of low energy fluid were further revealed. The design theory of a highly-loaded aspirated compressor was improved, which not only provide technical reserves for the formation and development of such fields as aspirated compressor, but also has the practical value of the recent projects.

英文关键词： Highly loeaded compressore；Flow control；Boundary layer suction；Flow separation；Aerodynamic performance