Synthetic jets with piezoelectric diaphragms

Mane, Poorna; Mossi, Karla; Bryant, Robert G.

doi:10.1117/12.599584

Cited by 6 publications

(8 citation statements)

References 23 publications

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“…For the sinusoidal signal, the maximum velocity during a period was about 50µm/s, while for the square wave signal, the maximum velocity was calculated to be 350-400µm/s, being a factor of about 7 larger than that with the sinusoidal signal. Mane et al (19) also mentioned this phenomenon of waveform dependence in piezoelectric actuated diaphragms. In Ref [19], the diaphragm velocity caused by square signal is around 5~6 times larger than that of sinusoidal signal.…”

Section: Pump Performancementioning

confidence: 93%

“…Mane et al (19) also mentioned this phenomenon of waveform dependence in piezoelectric actuated diaphragms. In Ref [19], the diaphragm velocity caused by square signal is around 5~6 times larger than that of sinusoidal signal. The reason of the velocity difference caused by driving signal type would be further considered in the next period of work.…”

Section: Pump Performancementioning

confidence: 93%

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A Micro Pump Driven by a Thin Film Permanent Magnet

Zhi

Shinshi

Uehara

2012

JAMDSM

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A valveless micro pump, utilizing a multi-layer thin film NdFeB/Ta permanent magnet (TFPM), is presented. The micro pump consists of a diaphragm actuator, comprising a TFPM, 6µm in thickness and 3 mm in diameter, which is bonded to a membrane made of polydimethylsiloxane (PDMS) of about 80µm in thickness, together with a pump chamber and a pair of diffuser elements. TFPM is sputtered on a 50µm thick Nb sheet. The diffuser elements are used to generate a one-way fluid flow. The chamber is made of acryl plates. UV negative film resist is used to bond the different layers. Compared to sinusoidal driving signal with same amplitude, a square driving signal can generate a higher flow rate. Applying a square wave voltage, ±7.5V in amplitude, the pump flow rate attains 130µL/min at a frequency of 15Hz. The flow rate is highly dependent on frequency and driving signal type. Diaphragm displacement, pump frequency is measured and analyzed.

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Section: Pump Performancementioning

confidence: 93%

Section: Pump Performancementioning

confidence: 93%

A Micro Pump Driven by a Thin Film Permanent Magnet

Zhi

Shinshi

Uehara

2012

JAMDSM

View full text Add to dashboard Cite

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“…The Bimorph actuator was driven at 140 Vpp, the Thunder at 400 Vpp, and the RFD at 800 Vpp. 10 It can be seen that the Bimorph actuator achieves the highest peak velocity for each driven waveform. Of these, the saw-tooth and square waveforms produced significantly higher velocities than the sine waveform.…”

Section: Synthetic Jets With Piezoelectric Diaphragmsmentioning

confidence: 91%

“…These include the square wave, which was used in this experiment based on previous research. 10 It is capable of generating waveforms with frequencies between 0.1 Hz and 20 MHz, at up to 10V. The minimum amplitude is 1.0e-4 Volts and the frequency accuracy is 0.01 Hz.…”

Section: Signal Generationmentioning

confidence: 99%

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Experimental Study of Delay of Separation on a NACA 0015 Wing Model Using Synthetic Jet Actuators

L'Esperance¹

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An experimental study has been conducted in the Cal Poly ME 0.61 m x 0.61 m (2 ft x 2 ft) subsonic wind tunnel of the effect of a piezoelectric synthetic jet actuator at 10% chord on a NACA 0015 finite wing up to α = 20° at Re C = 100,000. It was observed that the actuation is able to delay the separation over the NACA 0015 finite wing model up to α = 20°. For all the Cμ values tested, the synthetic jet excitation is effective at F + = 1, 2.8, and 13.9 at α = 16°, but only at F+ = 13.9 at α = 20°. At α = 16°, the C p suction peak under the synthetic jet excitation at F + = 1, 2.8, and 13.9 all gradually reduce from C p ≅ -4 at in the inboard area to about Cp ≅ -3 near the wingtip, about 25% reduction. The situation is similar for F + = 13.9 at α = 20° except at 2y/b = 0.30, the most inboard testing position, where the excitation shows almost no effect. The surprising result is that slit is not the only actuation influencing the flow. For F + from 1 to 2.8, the synthetic jet is indeed the most effective configuration and is successful in causing flow attachment as seen in previous experiments. For F + = 13.9, however, the flow is successfully attached with the model vibration caused by the actuators alone without the slit at 16°. At 20°, this configuration was not successful in delaying separation.v

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