Investigation of vortex motion mechanism of synthetic jet in a cross flow
Source abstract
Abstract
To investigate the mechanism of vortex motion, a pitched synthetic jet is arranged on the bottom of a cross flow and simulated by incompressible Naiver–Stokes equations with large eddy simulation. The Liutex vector identification method is utilized to quantitatively study the rotation strength and the core size of the vortex structures according to various driving frequencies (St = 0.25, 0.5, 0.75, 1.0) and amplitudes (A0 = 1.0, 1.5, 2.0, 2.5) of the synthetic jet during 21 periods. The results show that both the frequency and the amplitude play a significant role in the vortex generation mechanism of the synthetic jet. However, the amplitude makes a positive contribution to the rotation strength and the vortex core size, while the frequency makes a negative contribution. The vortex motion mechanism of a synthetic jet in a cross flow can be summarized as follows: low frequency and small amplitude favor the primary clockwise vortex, while high frequency and large amplitude motivate the anticlockwise vortex generation.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Fluid Dynamics and Turbulent Flows · Plasma and Flow Control in Aerodynamics · Aerodynamics and Acoustics in Jet Flows
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Energy and Power Engineering, University of Shanghai for Science and Technology 1 , Shanghai 200093, China
Shanghai Key Laboratory of Multiphase Flow and Heat Transfer for Power Engineering 2 , Shanghai 200093, China
Department of Mathematics, University of Central Arkansas 3 , Conway, Arkansas 72035, USA
Department of Mathematics, University of Texas at Arlington 4 , Arlington, Texas 76019, USA
5Institude No.25 of the Second Academy China Aerospace Science & Industry Corp, Beijing 100005, China
Funding
National Natural Science Foundation of China–State Grid Corporation Joint Fund for Smart Grid · Natural Science Foundation of Shanghai
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