Transient Characteristics of a Fluidic Device for Circulatory Jet Flow

Phan, Hoa Thanh; Dinh, Thien Xuan; Bui, Phong Nhu; Dau, Van Thanh

doi:10.3390/s18030849

Cited by 5 publications

(4 citation statements)

References 43 publications

(45 reference statements)

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“…The past century has been characterized by rapid advances in materials development, especially in functional materials, such as piezoceramic materials. Nowadays, on one hand, piezoceramic materials have found a wide spectrum of commercial applications [1,2], such as ultrasonic measurement [3][4][5], vibration sensing and control [6][7][8], force sensing [9,10], pumping and dosing [11][12][13], ultrasonic cleaner, ultrasonic welding, energy harvesting [14,15] and imaging [16], among others. On the other hand, piezoceramic materials and devices are still being actively researched to achieve better performance with lower cost and less environmental impact [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Dynamic Cone Angle on the Atomization Performance of a Piezoceramic Vibrating Mesh Atomizer

2019

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In this paper, we find that the dynamic cone angle of a piezoceramic atomizer is linked to periodic changes in the volume of the micro-cone hole of the atomizer, and such changes affect atomization performance. Firstly, we explained the theory of the dynamic cone angle inside the vibrating mesh atomizer. Then, we analyzed the flow status of liquid in the micro-cone hole, and the one-way flow Rof the liquid is caused by the difference of diffuser and nozzle flow resistance. The volume change of the micro-cone hole and the liquid chamber can produce atomization. Furthermore, we developed the experiment to measure the atomization rate, atomization height, and the diameter of the atomized particles. The experiments reveal that the atomization rate and height are much larger when the vibrating mesh atomizer is working in the forward path than in the reverse one. The atomization rate and atomization height increase as the working voltage increases. Meanwhile, with increasing driving voltage to the piezoceramic actuator, the atomization particle size decrease and the atomized particle size distribution is more concentrated. Finally, the size of the micro-cone hole was measured using a microscope with different direct current (DC) voltages, further demonstrating the existence of the dynamic cone angle.

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Section: Introductionmentioning

confidence: 99%

Effect of the Dynamic Cone Angle on the Atomization Performance of a Piezoceramic Vibrating Mesh Atomizer

2019

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“…The electric field then generates electro hydrodynamic forces inside the pilot liquid [10], [11]. Whereas a gyroscope utilizing jet flows eliminates the effect of linear acceleration by force convection, its configuration is rather larger and complex [12]- [14].…”

Section: Introductionmentioning

confidence: 99%

A study of angular rate sensing by corona discharge ion wind

Dau

Dinh

Tran

et al. 2018

Sensors and Actuators A: Physical

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We report an application of ion wind in angular rate sensing. A new design of a jet flow gyroscope using ion wind corona discharge is developed by conducting a numerical simulation and then an experimental analysis with regard to the advantages of a corona-discharge-based jet flow. Ion wind is generated by applying a high-voltage between a pin, as the discharge electrode, and a ring, as the reference electrode. The current-voltage characteristics of the discharge process by experimental works is set up as the boundary condition to describe the ion wind flow in the numerical simulation. A jet flow of ion wind is observed through an experiment and a simulation. When the gyroscope is subjected to an angular rate, the induced Coriolis force deflects the ion wind. This deflection is detected using four hotwires installed downstream of the working chamber behind the reference electrode. The experimental result show that the angular rate can be detected with a sensitivity of 4.7 µV/ o /s. Because ion wind can be generated with minimum power and does not require any vibrating components, the device is robust, consumes low power, and is cost-effective.

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“…The capability of the present device to detect angular rate is demonstrated using our developed turntable whose configuration can be found in our recent publication [19], [20]. The turntable whose angular velocity is monitored by an integrated encoder (Tsukasa Electric Ltd) is driven by a direct current motor.…”

Section: Resultsmentioning

confidence: 99%

Study on Point-to-Ring Corona Based Gyroscope

Van¹,

Bui

Tran

et al. 2019

2019 IEEE 32nd International Conference on Micro Electro Mechanical Systems (MEMS)

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We present for the first time a novel gyroscope using circulatory electro-hydrodynamics flow in a confined space. Three point-ring corona actuator is to generate ionic flows in three separated channels and the ionic flows then merge together at a nozzle of the main chamber to create a jet flow. The residual charge of ion winds is removed by a master-ring electrode. By the effect of angular rate, the jet flow handled by a hotwire anemometry is deflected and sensed. Results by both experiment and numerical simulation consistently show good repeatability and stability of the new configuration-based device. Since ion wind is generated by a minimum power, the device does not require any vibrating component, thus the device is robust, low cost and energy consumption.

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Transient Characteristics of a Fluidic Device for Circulatory Jet Flow

Cited by 5 publications

References 43 publications

Effect of the Dynamic Cone Angle on the Atomization Performance of a Piezoceramic Vibrating Mesh Atomizer

Effect of the Dynamic Cone Angle on the Atomization Performance of a Piezoceramic Vibrating Mesh Atomizer

A study of angular rate sensing by corona discharge ion wind

Study on Point-to-Ring Corona Based Gyroscope

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