Combined type synthetic jet actuator utilizing piezoelectric vibrating diaphragm and two-electrode plasma

Abstract

The invention discloses a combined jet actuator utilizing a piezoelectric vibrating diaphragm and a two-electrode plasma. The actuator comprises an exciter body, a piezoelectric vibrating thin film 5,a cover plate 3, an outlet seam 4 and an ignition positive pole 1, an ignition negative electrode 2 and an external pulse power supply, wherein a cavity is formed in the exciter body, during operation, the positive and negative electrodes connected to the two sides of the cavity of the actuator break down air to discharge, and the air in the discharge cavity is heated instantly; and the high-pressure plasma formed in the cavity of the actuator is under the combined action of the piezoelectric vibration thin film 5 through the outlet seam 4 is sprayed out at a high speed from an opening in thecover plate to form a high-speed jet flow. The problems that the jet speed is too low due to the piezoelectric vibration type actuator, the high-frequency plasma synthetic jet actuator is prone to causing accumulation of energy in the cavity, the temperature is too high and even exceeds the maximum limit of materials are solved, so that the synthesis jet speed can be increased, the temperature inthe cavity can be effectively reduced, meanwhile, the backfilling rate of the gas is increased, and the utilization efficiency of energy is improved.

Description

technical field [0001] The invention relates to the field of fast-response flow control, in particular to a combined synthetic jet exciter utilizing a piezoelectric vibrating film and two-electrode plasma. Background technique [0002] The early synthetic jets used the vibration of the vibrating membrane in the chamber of the synthetic jet exciter (such as piezoelectric, ferroelectric, electromagnetic and electrostatic or piston drive), to generate a series of unsteady waves that continuously expand at the exit hole / slit of the exciter. A vortex ring (or vortex pair) that has a predictable effect on the direction of the main flow. The characteristic of synthetic jet technology is that it does not need to introduce additional mass, but uses the fluid in the flow field to synthesize the jet, which is called "zero mass jet". It has unique advantages in the fields of gas mixing enhancement, flow control, micropump, vector control, etc., so it has very broad application prospect...

AI Technical Summary

Problems solved by technology

The actuator solves the problem of overheating caused by excessive energy accumulation, while improving energy utilization and increasing air backfill rates

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