Numerical study of nozzle design for the hybrid synthetic jet actuator

Hsu, Shang Wei; Chou, Yu‐Min; Trávníček, Z.; Lin, Chin‐Feng; Wang, A.-B.; Yen, R.-H.

doi:10.1016/j.sna.2015.05.018

Cited by 7 publications

(4 citation statements)

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“…Although there is no net mass transfer to ambient fluid, the device has the interesting feature of transferring a finite amount of momentum to the ambient fluid. [5,7,19,20] Based on this principle, a schematic illustration of our synthetic jet actuator design is shown in Figure 1, including the proposed structure of the DE-based synthetic jet actuator (Figure 1a), the ejection stroke ( Figure 1b), and the suction stroke ( Figure 1c). The 4 Â 4 biaxially prestretched DE membrane (VHB4910, 3M) was fixed in a 3D printed photosensitive resin frame.…”

Section: Propulsion Mechanism Of Synthetic Jet Using Dementioning

confidence: 99%

“…The synthetic jet actuator proposed in this article can be described as a zero‐net‐mass‐flux actuator because the integral of the mass flow rate across the orifice over an integer number of cycles is equal to zero. Although there is no net mass transfer to ambient fluid, the device has the interesting feature of transferring a finite amount of momentum to the ambient fluid . Based on this principle, a schematic illustration of our synthetic jet actuator design is shown in Figure , including the proposed structure of the DE‐based synthetic jet actuator (Figure a), the ejection stroke (Figure b), and the suction stroke (Figure c).…”

Section: Propulsion Mechanism Of Synthetic Jet Using Dementioning

confidence: 99%

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Cephalopod‐Inspired Swimming Robot Using Dielectric Elastomer Synthetic Jet Actuator

Tang

et al. 2019

Adv Eng Mater

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Jet propulsion is the main method of locomotion developed by cephalopods to swim through water, either for hunting or escaping from predators. Under this inspiration, diverse underwater robots utilizing jet propulsion-based locomotion are studied. This article presents a cephalopod-inspired robot based on a dielectric elastomer actuator, utilizing jet-propulsion actuation. The actuator is designed and optimized under the guidance of a corresponding electromechanical model. Then, the flow field characteristics of the synthetic jet actuator are simulated and analyzed. Equipped with the actuator, the bioinspired robot can locomote either with a speed of 0.66 body length per second on the surface of the water by jetting air or with a speed of 0.43 body length per second while almost completely submerged underwater by jetting water. The jet actuator presents even more environmental adaptability, which powers dual swimming locomotion by jetting two flow media, and can potentially be applied to the design of underwater robots.

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Section: Propulsion Mechanism Of Synthetic Jet Using Dementioning

confidence: 99%

Section: Propulsion Mechanism Of Synthetic Jet Using Dementioning

confidence: 99%

Cephalopod‐Inspired Swimming Robot Using Dielectric Elastomer Synthetic Jet Actuator

Tang

et al. 2019

Adv Eng Mater

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“…The integration of fluid diodes is designed to rectify oscillating air flow to suppress the backflow of hot (heated) air through the nozzle exit in the suction stroke. The volumetric efficiency is thus introduced to evaluate the rectifying effect of the proposed hybrid synthetic jet actuators on the air flow, which can be defined as [30]  = − + (10) where represents the air volume ejected out through the nozzle exit in one cycle by the actuators and denotes the air volume sucked back through the nozzle exit in one cycle.…”

Section: Calculation Of Dimensionless Parametersmentioning

confidence: 99%

Cooling performance improvement of impingement hybrid synthetic jets in a confined space with the aid of a fluid diode

Mei

Bai

et al. 2019

Applied Thermal Engineering

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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“…A modification of this technique using the Coanda effect was recently reported by Song et al [24] and He et al [25]. Finally, based on the working principle of a chain of vortexes, many design variants, for example, the combination of diffuser-nozzle or fluidic diode with the synthetic jet [26] [27], batwing-junction [28], T-junction [29], internal vortex membrane [30] were successfully applied in droplet forming, pinching, circulating or simultaneously pumping and mixing. Thus, it is reasonable to assume that the synthetic jet is a potential technique for improving the pumping performance by a smart structure which can enhance counter-rotating vortexes.…”

Section: Introductionmentioning

confidence: 99%