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- W4205976937 abstract "In the last three decades, the synthetic jet actuator has been studied in detail as an aerodynamic flow control device candidate, due to ongoing efforts of making flight operations more efficient. Being compact in size and not requiring piping makes synthetic jets attractive as a potential flow control method. In this study, two different cavity-orifice arrangements namely the opposite and adjacent orifice-diaphragm configurations are studied. Both cavity-orifice configurations actuated using two similar size piezoelectric actuators: namely unimorph and bimorph. The key performance criteria of the synthetic jet actuators are exit jet velocity and fluidic-to-power conversion efficiency which are assessed within the current study. It is identified that with a size optimised opposite configuration design, a peak jet velocity of 92 ms$^{-1}$ is obtained with a power efficiency of 6.4%, employing a bimorph actuator. In addition, with the adjacent configuration actuator, a peak jet velocity of 80.5 ms$^{-1}$ is obtained with a power efficiency of 5.1%, by using the bimorph actuator. While the jet velocity of the bimorph driven actuators are higher than the unimorph driven actuator, for efficiency it is the opposite case. At around the mechanical resonance frequency, bimorph driven actuator is drawn five times more current than the unimorph driven actuator. The peak efficiency of the bimorph driven actuator is around the Helmholtz resonance which promotes higher jet velocity with a relatively low current consumption. It is anticipated that the 10% higher jet velocity of the opposite configuration actuator can be sacrificed to obtain a higher flow control authority using the adjacent configuration in an array, with a closer consecutive orifice distance." @default.
- W4205976937 created "2022-01-25" @default.
- W4205976937 creator A5065612679 @default.
- W4205976937 date "2022-01-03" @default.
- W4205976937 modified "2023-09-27" @default.
- W4205976937 title "Jet Velocity Enhancement of Synthetic Jets: Unimorph vs. Bimorph Piezoelectric Actuator" @default.
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- W4205976937 doi "https://doi.org/10.2514/6.2022-0710" @default.
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