Energetic efficiencies of synthetic and hybrid synthetic jet actuators driven by electrodynamic transducers

Kordík, Jozef; Trávníček, Z.; Pavelka, Miroslav

doi:10.1016/j.expthermflusci.2015.08.005

Cited by 15 publications

(11 citation statements)

References 54 publications

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“…It was found out that the resonance frequency was the same for both nozzle types: f = 55Hz. We can extend this result also for other tested power levels, because as was shown in [31] the resonance frequency is nearly independent of the supplied power-input.…”

Section: Auxiliary Experimentsmentioning

confidence: 83%

Comparison of synthetic jet actuators based on sharp-edged and round-edged nozzles

Kordík

Trávníček

2017

EPJ Web Conf.

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Abstract. Axisymmetric synthetic jet actuators based on a loudspeaker and on two types of flanged nozzles were tested and compared experimentally. The first type of the nozzle was a sharp-edged circular hole. The second one had a special design with fillets at inner and outer nozzle exit and with a small step in the middle of the nozzle. The function of the step was to prevent the flow reattachment during the extrusion stroke. The actuators with the two types of nozzles were operated at resonance and were compared first qualitatively using a simple phase locked flow visualization. Then the hot-wire anemometer was used to measure velocity distributions along nozzle axis and velocity profiles at the nozzle exit. Comparison of the nozzles was based on evaluation of the characteristic velocity and integral quantities (volumetric, momentum, and kinetic energy fluxes). It was found out that these quantities, which were evaluated at the nozzle exit, differ substantially for both nozzles. On the other hand the velocity flow field in farther distances from the nozzle exit area did not exhibit such prominent differences.

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Section: Auxiliary Experimentsmentioning

confidence: 83%

Comparison of synthetic jet actuators based on sharp-edged and round-edged nozzles

Kordík

Trávníček

2017

EPJ Web Conf.

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“…In case of works [12,13] applications this actuator improved properties of test object without magnification of size. The next measurements involved in determining of operating characteristic of actuator with other phase shift ǻĳ.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…It must be noted that in [12] speakers works in this same way, what is provided by actuators construction. However, in [13] can be seen that work of one of speakers is suppressed. This is caused by putting the speaker in closed chamber.…”

Section: Introductionsmentioning

confidence: 99%

“…Although in [12,13,14] was used this specifical type of actuators, they do not include information about interferenc of wave, and how it influence at parameters of synthetic jet.…”

Section: Introductionsmentioning

confidence: 99%

“…Interesting method of generation synthetic jet was presented in [12,13,14]. In all of paper actuators was construct by replacement two of opposed walls by a diaphragm of speakers ( fig.…”

Section: Introductionsmentioning

confidence: 99%

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Interference in axisymmetric synthetic jet actuator

Smyk

2017

EPJ Web Conf.

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Abstract. The paper presents research of phenomena of mechanical wave interference during generate synthetic jets in actuator with two executive elements (speakers). Two speakers work with the same or other phase using the phenomenon of mechanical wave interference (sound wave). In effect the volume of ingestion and expulsion flow is a sum of two speakers' work. In this paper is presented analysis of operation so constructed axisymetric actuator and influence of phase shift -between work of the speakers -on actuator's operation.

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Application of flow control strategy of blowing, synthetic and plasma jet actuators in vertical axis wind turbines

Zhu

Hao

et al. 2019

Aerospace Science and Technology

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Energetic efficiencies of synthetic and hybrid synthetic jet actuators driven by electrodynamic transducers

Cited by 15 publications

References 54 publications

Comparison of synthetic jet actuators based on sharp-edged and round-edged nozzles

Comparison of synthetic jet actuators based on sharp-edged and round-edged nozzles

Interference in axisymmetric synthetic jet actuator

Application of flow control strategy of blowing, synthetic and plasma jet actuators in vertical axis wind turbines

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