Analysis of turbulent synthetic jet by dynamic mode decomposition

被引：2
|
作者：
Hyhlik, Tomas [1 ]
Netrebska, Hana [1 ]
Devera, Jakub [1 ]
Kalinay, Radomir [1 ]
机构：
[1] Czech Tech Univ, FME, Dept Fluid Dynam & Thermodynam, Tech 4, Prague 16607, Czech Republic
来源：
EXPERIMENTAL FLUID MECHANICS 2016 (EFM16 ) | 2017年 / 143卷
关键词：
FORMATION CRITERION;
D O I：
10.1051/epjconf/201714302040
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The article deals with the analysis of CFD results of the turbulent synthetic jet. The numerical simulation of Large Eddy Simulation (LES) using commercial solver ANSYS CFX has been performed. The unsteady flow field is studied from the point of view of identification of the moving vortex ring, which has been identified both on the snapshots of flow field using swirling-strength criterion and using the Dynamic Mode Decomposition (DMD) of five periods. It is shown that travelling vortex ring vanishes due to interaction with vortex structures in the synthesised turbulent jet. DMD modes with multiple of the basic frequency of synthetic jet, which are connected with travelling vortex structure, have largest DMD amplitudes.
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收藏
页数：4
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