A new structure of Tesla coupled nozzle in synthetic jet micro-pump

Tran, Canh‐Dung; Pham, Phuc Hong; Nguyen, Tuan‐Khoa; Phan, Hoang‐Phuong; Dinh, Toan; Nguyen, Thanh; Bui, Tung Thanh; Chu, Duc Trinh; Nguyen, Nam‐Trung; Dao, Dzung Viet; Dau, Van Thanh

doi:10.1016/j.sna.2020.112296

Cited by 17 publications

(8 citation statements)

References 39 publications

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“…As the direction from narrowing opening to wide opening is positive direction, the area ratio between narrow opening and wide opening, the divergence angle and the ratio between flow tube length and the width of the narrow opening [90]. In addition, Reynolds number has an obvious influence on the flow characteristics of the fluid passing through the narrow opening [91].…”

Section: Structural Classificationmentioning

confidence: 99%

“…They proved that the resistance in positive direction and performance is superior, and the highest flow rate comes to 3.6 ml min −1 and 350 Pa at 200 V p-p , 31 Hz with deionized water, the efficiency is 12.7 µl mm −2 . This year, Tran et al [91] proposed a Tesla coupled nozzle (TCN) for a synthetic jet micro-pump that can enhance the counter-rotating vortexes by rectifying the synthetic and promoting the performance of the pump. The TCN generates two pairs of vortexes by the Coanda effect to strengthen the rectification of the flowing medium and diminish the backflow.…”

Section: Pump With Specially Shaped Flow Tubementioning

confidence: 99%

“…As the schematic of the limitations is in figure 16, the backflow of the pump leads to low efficiency, and limits the further application of the pump, especially on the occasion of high flow rate at small space. Many scholars introduced the theoretical [155], structural optimization [91,97,125,176], and been verified through the numerical simulation to demonstrate the performance and efficiency enhancement. A simple power-law geometry tuning to modify the sidewall geometry of the diffuser/nozzle had been published by Arvind et al [92], that the geometric parameter adjustment for a wide range of operating conditions is proved by simulation and experiments to be effective, and could improve the pressure coefficients and efficiency of the structure.…”

Section: Limitations and Outlookmentioning

confidence: 99%

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Recent trends in structures and applications of valveless piezoelectric pump—a review

et al. 2022

J. Micromech. Microeng.

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Piezoelectric actuator-driven valveless pump has been studied for a long time in theory and structure for the features of high precision, fast response, low power consumption, compact size, reliability for long-term use and high performance. The pump has a remarkable significance for drug delivery, biological application, chemical analysis, high precision gluing, solder paste, lubrication system and electronic chip cooling system, etc. However, a higher requirement on the control circuit and power supply for the pump is raised, also, the driving voltage of the pump should be further reduced. In this review, the piezoelectric pump with and without valve is analysed in working principle. Then, the recent trends of valveless pump in different structures are discussed. The representative structural designs in different thinking are introduced in the working media, driven voltage, frequency, flow rate, pressure, and the efficiency of the pump, the performance of different pumps are also compared. Afterwards, the application of the pump for different purposes with featured structures are presented. Next are the limitations and the outlook of the pump, which provides some potential research points for subsequent studies, and ended with a summary. This review concludes the recent trends of valveless piezoelectric pump in structural and application, attempts to guide the researchers with different professional backgrounds that can solve current problems through cross-disciplinary approaches.

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Section: Structural Classificationmentioning

confidence: 99%

Section: Pump With Specially Shaped Flow Tubementioning

confidence: 99%

Section: Limitations and Outlookmentioning

confidence: 99%

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Recent trends in structures and applications of valveless piezoelectric pump—a review

et al. 2022

J. Micromech. Microeng.

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“…Micro-size rotating disks are found in small-scale steam-turbines, gas-turbines, wind-turbines, pumps, compressors, etc. which are very common in various small-size devices and machines (Kim and Yoon (2016); Reale and Sannino (2021); Tran et al (2020)) such as micro-CHP (combined heat and power) systems, Power MEMS (micro-electro-mechanical systems), micro-propulsion systems, micro-energy harvesters etc. Theoretical studies on mechanical behavior of micro-size components are mostly based on the modified couple stress theory (MCST) (Yang et al (2002)).…”

Section: Introductionmentioning

confidence: 99%

Axisymmetric bending vibration analysis of bidirectional functionally graded rotating micro-disk under thermo-mechanical loading

Pal

Das

2022

Journal of Vibration and Control

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The free vibration behavior of a bidirectional functionally graded rotating micro-disk that is subjected to uniform transverse pressure and high-temperature thermal loading has been studied. The micro-disk is functionally graded along the radial and thickness directions. The problem is mathematically formulated using two distinct but interrelated steps within the framework of Kirchhoff plate theory and modified couple stress theory. The first step determines the time-invariant deformed configuration of the micro-disk under centrifugal, pressure, and thermal loading using minimum potential energy principle. The second step determines the free vibration behavior of the micro-disk in the neighborhood of the deformed configuration using Hamilton’s principle. The solutions of the governing equations for both these steps are obtained using the Ritz method. The mathematical model is successfully validated with various reduced problems. The numerical results for the first four axisymmetric bending vibration modes are presented to investigate the effects of wide range of parameters such as rotational speed, applied pressure, thermal loading, size-dependent thickness, volume fraction indices, and radius ratio. The mode shapes of vibration are illustrated through surface and contour plots.

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“…In 2020, Heng et al [33] designed a centrifugal pump model based on the Tesla vane pump for conveying mud and multiphase flow, and they conducted preliminary experimental tests. Tran et al [34] developed a valveless micropump based on the combined principle of the nozzle and Tesla element to correct the synthetic jet, which can work under low voltage. However, there is still little research on the Tesla valve in the direction of piezoelectric pumps, and there is a lack of specific research on the structural parameter design and performance of the Tesla valve.…”

Section: Introductionmentioning

confidence: 99%

Valveless Piezoelectric Pump with Reverse Diversion Channel

et al. 2021

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In order to reduce backflow and improve output performance, a valveless piezoelectric pump with a reverse diversion channel was produced. The channel was designed based on the structure of the Tesla valve, which has no moving parts and can produce a high-pressure drop during reverse flow. Therefore, this special flowing channel can reduce the backflow of a valveless piezoelectric pump, which has the characteristic of one-way conduction. This work first revealed the relationship between the main structural parameters of the Tesla valve and the kinetic energy difference of liquid. Then, by using simulation software, the structure was verified to have the characteristics of effective suppression of the backflow of valveless piezoelectric pumps. Through setting multiple simulations, some important parameters that include the optimal height between the straight channels (H), the optimal angle (α) between the straight channel and the inclined channel, as well as the optimal radius (R) of the channel were confirmed. Finally, a series of prototypes were fabricated to test the output performance of this valveless piezoelectric pump. Comparing the experimental results, the optimal parameters of the Tesla valve were determined. The results suggest that when the parameters of the Tesla valve were H = 8 mm, α = 30°, and R = 3.4 mm, the output performance of this piezoelectric pump became best, which had a maximum flow rate of 79.26 mL/min with a piezoelectric actuator diameter of 35 mm, an applied voltage of 350 Vp-p, and a frequency of 28 Hz. The effect of this structure in reducing the return flow can be applied to fields such as agricultural irrigation.

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A new structure of Tesla coupled nozzle in synthetic jet micro-pump

Cited by 17 publications

References 39 publications

Recent trends in structures and applications of valveless piezoelectric pump—a review

Recent trends in structures and applications of valveless piezoelectric pump—a review

Axisymmetric bending vibration analysis of bidirectional functionally graded rotating micro-disk under thermo-mechanical loading

Valveless Piezoelectric Pump with Reverse Diversion Channel

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