Subjects: Dynamic and Electric Engineering >> Engineering Thermophysics submitted time 2017-11-07 Cooperative journals: 《工程热物理学报》
Abstract： The effect of circular, elliptical and curvature continuous leading edge on the development of boundary layer is studied by numerical simulation method. It is found that the influence of the leading edge suction peak on the aerodynamic performance in subsonic compressor blade is due to the fact the suction affects the initial development state of the boundary layer by extracting the parameters of the boundary layer under different working conditions and the velocity pattern of the bounder layer. The leading edge of the suction peak diffusion parameter Dspike is too strong will lead to the initial state of deterioration of the boundary layer, resulting in early transition, or even separation bubble, blade surface layer of rapid thickening, loss of blade increases, the available attack angle range reduced. The study also shows that the design of curvature continuous spikeless leading edge in any condition can always eliminate the suction surface or pressure surface near the leading edge of the suction peak, so that the initial state of the blade surface layer is better than the other leading edge, so aerodynamic performance should be better.
Subjects: Dynamic and Electric Engineering >> Engineering Thermophysics submitted time 2017-10-13 Cooperative journals: 《工程热物理学报》
Abstract：作者在国际上较早开展了轴流压气机等离子体流动控制研究工作,经过近十年的研究积累,对轴流压气机等离子体流动控制建立了较为深刻的认识。本文首先简要展示了轴流压气机等离子体流动控制的部分研究进展:以压气机叶栅为研究对象,分析了等离子体激励对叶顶泄漏流抑制的规律和机制;通过数值仿真和实验,研究了等离子体激励对高负荷轴流压气机失速的流动控制规律和机制;以高速压气机叶栅为研究对象,探索了吸力面和端壁等离子体激励对高速压气机三维角区分离的流动控制规律;然后介绍了等离子体激励式压气机的概念;最后给出了对未来研究工作的展望。
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