Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator

Version 1 : Received: 25 February 2020 / Approved: 26 February 2020 / Online: 26 February 2020 (02:17:51 CET)

A peer-reviewed article of this Preprint also exists.

Oz, F.; Kara, K. Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator. Fluids 2020, 5, 72. Oz, F.; Kara, K. Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator. Fluids 2020, 5, 72.

Journal reference: Fluids 2020, 5, 72
DOI: 10.3390/fluids5020072

Abstract

The time-resolved flowfield of a spatially oscillating jet emitted by a Sweeping Jet (SWJ) actuator is investigated numerically using three-dimensional Reynolds-averaged Navier-Stokes (3D-URANS) equations. Numerical simulations are performed for a practical range of mass flow rates providing flow conditions ranging from incompressible to subsonic compressible flows. A linear relationship between the mass flow rate and the jet oscillation frequency is found. The results of the numerical model are compared with the experimental data in the literature, and good agreement is found. Additionally, it is observed that the SWJ actuator frequency response switches from one linear mode to another linear mode when the compressibility effects become important.

Subject Areas

sweeping jet actuator; jet oscillation frequency; compressibility effect; unsteady Reynolds–Averaged Navier–Stokes; mass flow rate

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