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High resolution visualization of Görtler-like vortices in supersonic compression ramp flow

机译:超音速压缩坡道流中Görtler样涡旋的高分辨率可视化

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摘要

Compression ramp flow is a classical problem of shock wave/turbulent boundary layer interactions, which is frequently encountered in flow devices, e.g., hypersonic inlets and turbomachinery (Settles et al. 1979). The compression ramp flow contains some basic flow phenomena like flow separation, low frequency oscillation of the shock and separation bubble as well as a special streamwise vortex structure, named Gortler-like vortices, which is generally observed on concave surfaces. Settles et al. (1979) first observed the streamwise vortices in compression ramp flow by oil flow visualization method, therewith the Gortler-like vortices has been numerically found by large eddy simulation (Loginov et al. 2006). However, the oil flow method can only obtain some limited macro characteristics of Gortler-like vortices, more detailed visualizations of Gortler-like vortices are still lacked. In this paper, the nano-tracer planar laser scattering (NPLS) technique is applied to capture the detailed characteristics of Gortler-like vortices.
机译:压缩坡道流是冲击波/湍流边界层相互作用的经典问题,在高超声速入口和涡轮机械等流动装置中经常遇到(Settles等人,1979)。压缩坡道流动包含一些基本的流动现象,例如流动分离,激波和分离气泡的低频振荡,以及一种特殊的沿流涡旋结构,称为戈特勒式涡旋,通常在凹面观察到。 Settles等。 (1979年)首先通过油流可视化方法观察到压缩坡道流中的沿流涡流,并通过大涡模拟在数值上发现了Gortler类涡流(Loginov等人,2006年)。然而,油流方法只能获得一些有限的Gortler类涡旋宏观特征,但仍缺乏更详细的Gortler类涡旋可视化效果。在本文中,采用纳米示踪平面激光散射(NPLS)技术来捕获类似Gortler涡旋的详细特征。

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  • 来源
    《Journal of visualization》 |2017年第3期|505-508|共4页
  • 作者单位

    Nanjing University of Aeronautics and Astronautics, Nanjing, China;

    Nanjing University of Aeronautics and Astronautics, Nanjing, China;

    Nanjing University of Aeronautics and Astronautics, Nanjing, China;

    Nanjing University of Aeronautics and Astronautics, Nanjing, China;

    Nanjing University of Aeronautics and Astronautics, Nanjing, China;

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