Synthetic jet device based on electromagnetic drive

Abstract

The invention discloses a synthetic jet device based on electromagnetic drive. The synthetic jet device mainly comprises an electromagnet (1), an assembling shell (2) and a synthetic jet device body (3). The electromagnet (1) adjusts and controls the distance between the electromagnet (1) and an elastic vibration film (3-2) through threads. Current in sinusoidal variation is fed into the electromagnet (1) to generate an alternating magnetic field so as to generate alternating electromagnetic force for a permanent magnet film (3-1). The permanent magnet film (3-1) drives the elastic vibration film (3-2) to vibrate, the pressure of a gas cavity formed by the elastic vibration film (3-2) and a cavity body (3-3) varies, and synthetic jet flow is generated through a jet opening (3-4). The synthetic jet device is low in working voltage, large in non-contact drive force, large in air outlet amount, reasonable in design, simple in structure, and capable of realizing active flow control.

Description

technical field [0001] The invention relates to an electromagnetically driven synthetic jet device, which can be used in flow control directions such as active flow control, jet vector control, enhanced mixing and enhanced heat transfer and heat exchange control. Background technique [0002] Synthetic jet has broad application prospects in the field of active flow control. Synthetic jet actuator is the core component of synthetic jet technology. The driving function is realized by vibration of the diaphragm during work. It only needs to change the frequency, amplitude and phase of the electrical signal of the actuator. It can be adjusted and controlled according to requirements. The synthetic jet actuator mainly has piezoelectric, electrostatic, electromagnetic and other driving methods. It uses these driving methods to make the diaphragm vibrate in the air, which causes the volume of the cavity to change, so that the external gas is continuously sucked into and discharged ...

AI Technical Summary

Problems solved by technology

The piston vibrating actuator can provide large synthetic jet energy, but it needs a motor drive to drive the piston to vibrate, and the frequency is not high

Shape memory alloy actuated actuators and polyvinylidene fluoride membrane vibration can also provide greater synthetic jet energy, but the operating frequency is low

Piezoelectric film vibration actuator has simple structure, high operating frequency, quick response and good repeatability. It is currently the most researched and widely used synthetic jet actuator. Its main disadvantage is that the synthetic jet energy level is biased Low

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