Optimization of Synthetic Jet Actuator design for noise reduction and velocity enhancement

2016 ◽  
Author(s):  
Jonne Jeyalingam ◽  
Mark Jabbal
Keyword(s):  
Noise Reduction ◽  
Synthetic Jet ◽  
Synthetic Jet Actuator ◽  
Actuator Design ◽  
Velocity Enhancement

STUDY THE ORIFICE EFFECTS OF A SYNTHETIC JET ACTUATOR DESIGN

2015 ◽  
Vol 77 (8) ◽  
Author(s):  
Md Nizam Dahalan ◽  
Shuhaimi Mansor ◽  
Muhammad Muzakkir Faiz Ali
Keyword(s):  
Coming Out ◽  
Active Flow Control ◽  
Input Voltage ◽  
Control Device ◽  
Synthetic Jet ◽  
Constant Input ◽  
Synthetic Jet Actuator ◽  
Jet Velocity ◽  
Actuator Design ◽  
Pulse Jet

The synthetic jet actuator is an active flow control device that is used to improve the aerodynamic performance on working surfaces such as wings, helicopter blades and ground vehicles. The performance of synthetic jet actuator depends on the design of the orifice and cavity, and the oscillating driver. Piezoelectric diaphragm was used as an oscillating driver because of its small size and easier installation. The focus of this project is to study the effects of orifice size and shape for a synthetic jet actuator design. The effects were studied on circular and rectangular shapes, and different sizes of orifice. Meanwhile, the configurations of the cavity are fixed. Experiments were performed to determine the maximum pulse jet velocity and turbulence intensities of the jet coming out of the orifice, driven by the Piezoelectric diaphragm at different frequencies, at constant input voltage of 2V. The experiment mainly involved the measurement of the exit pulse jet velocity using a hot-wire anemometer. The results demonstrated that the circular orifice produced higher maximum pulse jet velocity and smaller sizes orifices, both circular and rectangular, results in higher velocity jets.

scholarly journals Cephalopod‐Inspired Swimming Robot Using Dielectric Elastomer Synthetic Jet Actuator

2020 ◽  
Vol 22 (4) ◽  
pp. 2070014
Author(s):  
Chao Tang ◽  
Wentao Ma ◽  
Bo Li ◽  
Mingliang Jin ◽  
Hualing Chen
Keyword(s):  
Dielectric Elastomer ◽  
Synthetic Jet ◽  
Synthetic Jet Actuator

Analytical Model: Characteristics of Nanosecond Pulsed Plasma Synthetic Jet Actuator in Multiple-Pulsed Mode

2017 ◽  
Vol 9 (2) ◽  
pp. 439-462 ◽  
Author(s):  
Zheng Li ◽  
Zhiwei Shi ◽  
Hai Du
Keyword(s):  
Flow Characteristics ◽  
Simulation Method ◽  
Synthetic Jet ◽  
Blast Waves ◽  
Pulsed Plasma ◽  
Synthetic Jet Actuator ◽  
Field Coupling ◽  
Neutral Gas ◽  
Pulsed Mode ◽  
Physical Principles

AbstractMulti-field coupling simulation method based on the physical principles is used to simulate the discharge characteristics of nanosecond pulsed plasma synthetic jet actuator. Considering the effect of the energy transferring for air, the flow characteristics of nanosecond pulsed plasma synthetic jet actuator are simulated. The elastic heating sources and ion joule heating sources are the two main sources of energy. Through the collisions, the energy of ions is transferred to the neutral gas quickly. The flow characteristics of a series of blast waves and the synthetic jet which erupt from the plasma synthetic jet (PSJ) actuator are simulated. The blast wave not only promotes outward, but also accelerates the gas mixing the inhaled gas from the outside cavity with the residual gas inside the cavity. The performances of PSJ actuator fluctuate in the first three incentive cycles and become stable after that.

scholarly journals Novel Nozzle Shapes for Synthetic Jet Actuators Intended to Enhance Jet Momentum Flux

Actuators ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 53 ◽  
Author(s):  
Jozef Kordík ◽  
Zdeněk Trávníček
Keyword(s):  
Momentum Flux ◽  
Element Model ◽  
Velocity Profiles ◽  
Input Power ◽  
Synthetic Jet ◽  
Stroke Length ◽  
Synthetic Jet Actuator ◽  
Pressure Loss Coefficient ◽  
Nozzle Plate ◽  
Lumped Element Model

An axisymmetric synthetic jet actuator based on a loudspeaker and five types of flanged nozzles were experimentally tested and compared. The first (reference) type of nozzle was a common sharp-edged circular hole. The second type had a rounded lip on the inside. The third nozzle type was assembled from these two types of nozzles—it had a rounded lip on the inside and straight section on the outside. The fourth nozzle was assembled using orifice plates such that the rounded lips were at both inner and outer nozzle ends. The last nozzle was equipped with an auxiliary nozzle plate placed at a small distance downstream of the main nozzle. The actuators with particular nozzles were tested by direct measurement of the synthetic jet (SJ) time-mean thrust using precision scales. Velocity profiles at the actuator nozzle exit were measured by a hot-wire anemometer. Experiments were performed at eight power levels and at the actuator resonance frequency. The highest momentum flux was achieved by the nozzle equipped with an auxiliary nozzle plate. Namely, an enhancement was approximately 31% in comparison with an effect of the reference nozzle at the same input power. Furthermore, based on the cavity pressure and the experimental velocity profiles, parameters for a lumped element model (mass of moving fluid and pressure loss coefficient) were evaluated. These values were studied as functions of the dimensionless stroke length.

Novel Piston-Type Synthetic Jet Actuator with Auxiliary Air Inlet

2019 ◽  
Vol 32 (1) ◽  
pp. 04018127
Author(s):  
Qitai Eri ◽  
Liang Hong ◽  
Ting Li
Keyword(s):  
Synthetic Jet ◽  
Synthetic Jet Actuator ◽  
Air Inlet
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