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Spatial and spectral investigation of turbulent kinetic energy in cavitating flow generated by Clark-Y hydrofoil
Journal of Hydrodynamics ( IF 2.5 ) Pub Date : 2020-03-04 , DOI: 10.1007/s42241-020-0009-1
Xiao-rui Bai , Huai-yu Cheng , Bin Ji , Xin-ping Long

In the present paper, the turbulent cavitating flow generated by a Clark-Y hydrofoil is investigated by large eddy simulation (LES) combined with Zwart-Gerber-Belamri (ZGB) cavitation model. In order to shed light on the influence of cavitation on turbulent energy distribution among scales, energy spectrum obtained from the three-dimensional velocity field is firstly applied to turbulent cavitating flow. Spatial and spectral distributions of turbulent kinetic energy are studied for both non-cavitating flow and cavitating flow. Cavitation is found to have a significant effect on the original turbulent flow by inducing more large-scale turbulent structures. The energy spectrum of cloud cavitating flow also experiences a periodic evolution as cavitation develops, and a large amount of turbulent kinetic energy is found to generate as the first shedding, cutoff and second shedding of cavities happen.

中文翻译:

Clark-Y水翼产生的空化流中湍动能的空间和谱研究

本文通过大涡模拟(LES)结合Zwart-Gerber-Belamri(ZGB)空化模型研究了Clark-Y水翼产生的湍流空化流。为了揭示空化对栅尺间湍流能量分布的影响,首先将三维速度场获得的能谱应用于湍流空化流。研究了非空化流和空化流的湍动能的空间和频谱分布。发现空化通过诱导更大规模的湍流结构而对原始湍流产生重大影响。随着空化的发展,空化流的能谱也经历了周期性的演化,
更新日期:2020-03-04
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