Multi-Field Analysis and Experimental Verification on Piezoelectric Valve-Less Pumps Actuated by Centrifugal Force

Ma, Yuting; Pei, Zhiguo; Chen, Zhong-Xiang

doi:10.1007/s10033-017-0146-9

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…The VOF method is first proposed by Hirt and Nichols [19] based on MAC method. It is widely used to solve the interactions owing to the capability of simulating the fragmentation and coalescence of fluid regions [20]. In the VOF method, the mixture is assumed to be uniform, and each phase has the same velocity and pressure in every control volume.…”

Section: Validation Of the Modelmentioning

confidence: 99%

Mathematical Model of Drag Torque with Surface Tension in Single-Plate Wet Clutch

Peng

Yuan

2019

Chin. J. Mech. Eng.

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Reduction of drag torque in disengaged wet clutches is essential for transmission research because it is one of the potentials of efficiency improvement. Aeration of oil film between two closely rotating plates promotes the decrease of drag torque at high speed region. The effects of surface tension and static contact angles during aeration are nonnegligible showed by test results. The traditional lubrication model does not adequately predict the experimental results with different surface tension and contact angles during aeration. Hence, in this present paper, contact angles between Aluminum and Teflon materials were firstly measured, and the drag torques under two different contact angles were examined experimentally. An improved lubrication model of drag torque based on Navier-Stokes equations at the gas-liquid interface was built. The lubrication boundary condition was modified to introduce the effects of surface tension and contact angle. The model shows that the effects at the beginning of aeration of oil film are significant. These effects almost occur at stationary plate due to low Reynolds number and Weber number. The model shows that an increase in the surface tension promotes aeration, but does not affect the peak drag torque. Increasing contact angle also promotes the aeration, and accelerates the decrease of drag torque. The larger contact angle is, the smaller the peak drag torque will be. A computational fluid dynamics (CFD) model based on volume of fluid (VOF) method was presented to validate the interface shape when aeration occurs. The model prediction has a good agreement with experimental observations for Aluminum plates and Teflon plates. The modified lubrication model of drag torque gives a convenient description of the effects of surface tension and contact angel, and lays down a frame to understand the beginning of aeration.

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Section: Validation Of the Modelmentioning

confidence: 99%

Mathematical Model of Drag Torque with Surface Tension in Single-Plate Wet Clutch

Peng

Yuan

2019

Chin. J. Mech. Eng.

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“…Piezoelectric pumps basically utilize the reciprocating deformation of piezoelectric actuators to transport liquid [6], and can be mainly divided into reciprocating pumps [7], peristaltic pumps [8], traveling wave pumps [9], centrifugal pumps [10], and some new kinds of pumps [11,12], according to different working principles. Among them, reciprocating pumps are most reported in literatures, including diaphragm pumps and piston type pumps.…”

Section: Introductionmentioning

confidence: 99%

Improving Output Performance of a Resonant Piezoelectric Pump by Adding Proof Masses to a U-Shaped Piezoelectric Resonator

et al. 2021

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This study proposes the improvement of the output performance of a resonant piezoelectric pump by adding proof masses to the free ends of the prongs of a U-shaped piezoelectric resonator. Simulation analyses show that the out-of-phase resonant frequency of the developed resonator can be tuned more efficiently within a more compact structure to the optimal operating frequency of the check valves by adjusting the thickness of the proof masses, which ensures that both the resonator and the check valves can operate at the best condition in a piezoelectric pump. A separable prototype piezoelectric pump composed of the proposed resonator and two diaphragm pumps was designed and fabricated with outline dimensions of 30 mm × 37 mm × 54 mm. Experimental results demonstrate remarkable improvements in the output performance and working efficiency of the piezoelectric pump. With the working fluid of liquid water and under a sinusoidal driving voltage of 298.5 Vpp, the miniature pump can achieve the maximum flow rate of 2258.9 mL/min with the highest volume efficiency of 77.1% and power consumption of 2.12 W under zero backpressure at 311/312 Hz, and the highest backpressure of 157.3 kPa under zero flow rate at 383 Hz.

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“…For example, Scholars in Brazil proposed a novel piezoelectric pump with a bionic fishtail structure, which inserted the piezoelectric actuator into the fluid to realize the pumping (de Lima et al, 2009). Scholars also proposed a piezoelectric centrifugal pump that uses the centrifugal force generated by the swing of the tube to drive the fluid (Ma et al, 2017). These studies are no longer limited to volume changes to produce flow, but this new pump output performance is limited, so they are difficult to practical application.…”

Section: Introductionmentioning

confidence: 99%

Development of a novel piezoelectric-actuated inertial pump using bionic valve

Ding

Chen

et al. 2021

Journal of Intelligent Material Systems and Structures

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Sampling fluids from the small-diameter deep pipeline is a challenging problem. In this paper, a very simple, piezoelectric-actuated inertial pump (PIP) is developed using a bionic valve to solve these problems. The PIP consists of simple components, including a cantilever beam piezoelectric actuator, a hard tube, and a bionic valve made of silicone. The fluid is driven by the inertial force generated in the vibration process of the tube. A new bionic valve inspired by a heart valve has been designed which has the advantages of small flow resistance and large flow area. The authors described the working principle of PIP in detail, established the flow characteristics model of the bionic valve, and used COMSOL Multiphysics to analyze the characteristics of the bionic valve. By comparing the response characteristics of the bionic valve with different tilt angles, the optimal Angle was obtained. Finally, the experimental and simulation results were compared, and the basic performance of PIP was tested. The experimental results showed that: When the tilting angle was 45° and the valve hole diameter was 6 mm, when the voltage was 98 V and the frequency was 24.5 Hz, the maximum output flow of the piezoelectric pump was 170.25 ml/min.

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Multi-Field Analysis and Experimental Verification on Piezoelectric Valve-Less Pumps Actuated by Centrifugal Force

Cited by 5 publications

References 27 publications

Mathematical Model of Drag Torque with Surface Tension in Single-Plate Wet Clutch

Mathematical Model of Drag Torque with Surface Tension in Single-Plate Wet Clutch

Improving Output Performance of a Resonant Piezoelectric Pump by Adding Proof Masses to a U-Shaped Piezoelectric Resonator

Development of a novel piezoelectric-actuated inertial pump using bionic valve

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