Optimization of Synthetic Jet Actuators
نویسندگان
چکیده
This paper describes the optimization of a piezoelectric-driven synthetic jet actuator based on a Lumped Element Modeling (LEM). To simplify the problem, this papers splits the optimization problem into two parts. First, a constrained optimization of the cavity volume and orifice dimensions of two baseline synthetic jets, each with a given piezoelectric diaphragm, is conducted using two different objective functions. One seeks to improve the centerline output velocity over a broad frequency range, and the other maximizes the centerline velocity at a prescribed resonant frequency of the device. Significant improvements are achieved using both objective functions for both synthetic jets. Second, the two baseline piezoelectric diaphragms have been optimized using two configurations. One uses the standard inner-disc piezoceramic patch bonded to a metal shim, while the other employs an outer piezoceramic ring. In each case, the objective is to maximize the achievable volume displacement of the diaphragm at the coercive electric field strength of the piezoceramic, while the natural frequency of the piezoelectric diaphragm is constrained to be greater than or equal to the baseline designs. Both configurations yield modest (~5%) improvements for one diaphragm and significant improvements for the other diaphragm (>50%).
منابع مشابه
Modeling and Multi-Objective Optimization of Stall Control on NACA0015 Airfoil with a Synthetic Jet using GMDH Type Neural Networks and Genetic Algorithms
This study concerns numerical simulation, modeling and optimization of aerodynamic stall control using a synthetic jet actuator. Thenumerical simulation was carried out by a large-eddy simulation that employs a RNG-based model as the subgrid-scale model. The flow around a NACA0015 airfoil, including a synthetic jet located at 10 % of the chord, is studied under Reynolds number Re = 12.7 × 106 a...
متن کاملPulsatile vortex generators for low-speed maneuvering of small underwater vehicles
Compact zero-mass pulsatile jet actuators are proposed for low-speed maneuvering and station keeping of small underwater vehicles. The flow field of such jets are initially dominated by vortex ring formation. Pinched-off vortices characterize the extremum impulse accumulated by the leading vortex ring in a vortex ring formation process. Relevant parameters in this process are identified in orde...
متن کاملZero-mass Pulsatile Jets for Unmanned Underwater Vehicle Maneuvering
Compact zero-mass pulsatile jet actuators are proposed for low speed maneuvering, ducking, and station keeping of small underwater vehicles. To this end, optimization of synthetic jets for maximal thrust generation is investigated. Flow field of such jets are initially dominated by vortex ring formation. Pinched-off vortices characterize the extremum impulse accumulated by the leading vortex ri...
متن کاملModeling and Multi-objective Optimization of Stall Control on Naca0015 Airfoil with a Synthetic Jet Using Gmdh Type Neural Networks and Genetic Algorithms
This study concerns numerical simulation, modeling and optimization of aerodynamic stall control using a synthetic jet actuator. The numerical simulation was carried out by a large-eddy simulation that employs a RNG-based model as the subgrid-scale model. The flow around a NACA0015 airfoil, including a synthetic jet located at 10 % of the chord, is studied under Reynolds number Re = 12.7 × 10 a...
متن کاملA Jet Formation Criterion for Synthetic Jet Actuators
This paper proposes and validates a jet formation criterion for synthetic jet actuators. The synthetic jet is a zero net mass flux device, adding additional momentum but no mass to its surroundings. Jet formation is defined as a mean outward velocity along the jet axis and corresponds to the clear formation of shed vortices. It is shown that the synthetic jet formation is governed by the Strouh...
متن کاملPiezoelectric Actuators for Synthetic Jet Applications
Synthetic jets have been identified and utilized widely in airflow control applications. These jets of air are usually created by the use of compressed air, or an electromechanically driven vibrating platform. All of these approaches produce desired results in airflow-control such as enhanced lift and increased maneuverability. Despite the results however, system weight, size, response time and...
متن کامل