轴流压气机等离子体流动控制机理研究

Plasma flow control, which is advantageous of its broad actuation band (10Hz-100kHz) and other technological superiorities, is a new development direction of compressor active flow control. Exploring the mechanism of coupling effects beteween plasma aerodynamic actuation and compressor unsteady flow is a key scientific issue. Based on the long-term study on plasma flow control and compressor stability, we put forward the academic thought of unsteady coupling between highly efficient plasma aerodynamic actuation and near-stall characteristic flow in compressors, and investigate on mechanism of plasma flow control in axial compressors. The research mainly includes the method and characteristics of highly efficient plasma aerodynamic actuation, coupling simulation model and method of plasma aerodynamic actuation and compressor internal flow, as well as response of near-stall characteristic flow to plasma aerodynamic actuation on rotor tip endwall and stator surface. Directed by experiments and supported by numerical simulation and theoretical analysis, we will finish the experiments on subsonic axial compressors. Highly efficient plasma aerodynamic actuation method will be put forward. The coupling effects between plasma aerodynamic actuation and near-stall characteristic flow will be revealed. The original innovation of mechanism and method of compressor plasma flow control will be achieved, thus provide creative theories and technical supplementary for the design of high performance axial compressor, and promote the development of plasma gas dynamics.

等离子体流动控制具有激励频带宽(10Hz-100kHz)等突出技术优势，是压气机主动流动控制发展的新方向。揭示等离子体气动激励与压气机非定常流动的耦合作用机制，是一个重要的科学问题。在长期开展等离子体流动控制和压气机稳定性研究的基础上，提出高效能等离子体气动激励与压气机近失速特征流动非定常耦合的学术思想，开展轴流压气机等离子体流动控制机理研究，主要研究内容包括：高效能等离子体气动激励实现方法与特性，等离子体气动激励与压气机内部流动的耦合仿真模型与方法，压气机近失速特征流动对转子叶尖端壁、静叶表面等离子体气动激励的响应机制。以亚声速轴流压气机为对象，通过实验、仿真和理论分析，提出高效能等离子体气动激励方法，揭示等离子体气动激励与压气机近失速特征流动的耦合作用机制，实现压气机等离子体流动控制机理和方法的原始创新，为高性能轴流压气机设计提供创新的理论和方法支持，推动等离子体气体动力学的发展。

等离子体流动控制具有激励频带宽(10Hz-100kHz)等突出技术优势，是压气机主动流动控制发展的新方向。揭示等离子体气动激励与压气机非定常流动的耦合作用机制，是一个重要的科学问题。在长期开展等离子体流动控制和压气机稳定性研究的基础上，提出高效能等离子体气动激励与压气机近失速特征流动非定常耦合的学术思想，开展轴流压气机等离子体流动控制机理研究，主要研究内容包括：高效能等离子体气动激励实现方法与特性，等离子体气动激励与压气机内部流动的耦合仿真模型与方法，压气机近失速特征流动对转子叶尖端壁、静叶表面等离子体气动激励的响应机制。开展了面向流动控制的长寿命等离子体激励器基础研究，从聚酰亚胺基和陶瓷基等离子体激励器两个方面，揭示传统激励器放电过程中的材料老化机理，发展新型长寿命激励器并揭示其耐老化机理。基于发展的高性能等离子体激励器，针对显著影响发动机性能的转子叶尖尖区流动和静叶流动分离开展等离子体流动控制研究，通过数值仿真和实验，深入揭示了现代高负荷压气机失速等离子体流动控制的规律和机制，探索了高速压气机三维角区分离等离子体流动控制的有效策略，研究成果可为发展宽裕度、高效率等离子体激励式高负荷压气机设计技术提供理论支撑。