Interference in axisymmetric synthetic jet actuator

Smyk, Emil

doi:10.1051/epjconf/201714302111

Cited by 6 publications

(7 citation statements)

References 9 publications

(13 reference statements)

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“…The number of samples 8 n = also introduced another negative conclusion -tests carried out at the same point were characterized by a significant dispersion which was not observed for the equal n = 4 096. A similar analysis that also gave positive results was done in Smyk et al, 2017. Conducted measurements were industrial research (Peszyński, 2018). They are characterized by lower accuracy required.…”

Section: Discussionmentioning

confidence: 68%

Tuning of Adjustable Parameters of Hwa Hardware During Development of New Type Ventilation System

Wawrzyniak¹,

Peszyński²

2020

Engineering Mechanics 2020

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The article presents the results of testing adjustable parameters of HWA hardware: sampling frequency and number of samples necessary to ensure a short measurement time and appropriate test quality. There is also presented the general test stand used when investigating the properties of flow in ventilation ducts of rectangle cross-section with rounded corners. Finally, the air velocity distributions along the symmetry axis of the selected channel related to the values calculated using the FLUENT code are presented.

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Section: Discussionmentioning

confidence: 68%

Tuning of Adjustable Parameters of Hwa Hardware During Development of New Type Ventilation System

Wawrzyniak¹,

Peszyński²

2020

Engineering Mechanics 2020

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“…Theoretically, it is enough but in the real actuator with two diaphragms, they can operate with a small delay relative to each other and the used loudspeakers may have different properties. The paper [24] demonstrated the impact of phase shift between two diaphragms on the SJs parameters, but the impact of phase shift on resonant frequencies probably isn't yet investigated. It is similar for diaphragms operated in the same phase but with other conditions, see [25].…”

Section: Discussionmentioning

confidence: 99%

“…Among others, the method for improving or changing the SJ parameters can be improved by modification of the actuator cavity shape [17], use of two or more actuators operating together with the nozzle, placed next to each other [18,19], the use of double orifice [6,20] or use of more than one diaphragm [21][22][23]. The benefits of using two diaphragms, instead of one, are described in [24,25]. Two diaphragms are also used for the HSJ [16,26].…”

Section: Introductionmentioning

confidence: 99%

Synthetic jet actuator with two opposite diaphragms

Smyk

Wawrzyniak

Peszyński

2020

Mechanics and Mechanical Engineering

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The synthetic jet actuators are one of the most investigated types of actuators used in heat transfer and active flow control. The energetic efficiency of actuators is a key parameter determining the possibility of device use. The actuators with two or more diaphragms have higher efficiency than the actuators with only one. The paper presents the investigations of the acoustic synthetic jet actuator with two opposite diaphragms. In the paper, synthetic jet velocity, Reynolds number and the energetic efficiency as a function of oscillating actuator frequency, for a different cavity, orifice configuration and one real input power P0 = 2 W were studied. The possibility of theoretical calculation of first and second resonance frequency were checked. The coupling ratio for actuators was calculated. The maximum energetic efficiency was η = 8.67% and Reynolds number Re = 8503. The possibility of using the same dependencies and rules during the design of actuators with two opposite diaphragms as in the case of actuators with one diaphragm was demonstrated. The results may be useful in the design of the actuators of the two membranes.

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“…One of sleeve creates from the back of the speaker closed chamber. A analysis of closed chamber influence on generated SJ was presented in the (Smyk, 2017). Loudspeakers operate in opposite directions, what means that they operate in the same phase.…”

Section: Observed Parametersmentioning

confidence: 99%

Comparison of acoustic synthetic jet actuator with one and two diaphragms

2018

Engineering Mechanics

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The paper investigates the synthetic jet actuators based on similar geometries but with another number of diaphragms or them operates conditions: one ediaphragm, one diaphragm with damped chamber or both diaphragm together. The actuators operates close to first resonance frequencies and was supply by a harmonic power input. The characteristic velocity as function of the input real power were measured. On this basis, approximate values of momentum flux, kinetic energy and efficiency were determined. The paper presented benefits of using synthetic jets actuator with two diaphragms. The used of two diaphragms increase the value of, momentum flux about 79.62%, kinetic energy about 140.72% and energetic efficiency about 140.72% relative to actuator with one undamped diaphragm by the same value of real power input.

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Interference in axisymmetric synthetic jet actuator

Cited by 6 publications

References 9 publications

Tuning of Adjustable Parameters of Hwa Hardware During Development of New Type Ventilation System

Tuning of Adjustable Parameters of Hwa Hardware During Development of New Type Ventilation System

Synthetic jet actuator with two opposite diaphragms

Comparison of acoustic synthetic jet actuator with one and two diaphragms

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