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Synthetic jetting excitor with single-membrane, double openings and double cavities

A technology for synthesizing jets and exciters, applied in the directions of fluid flow, mechanical equipment, etc., can solve problems such as ballast of the vibrating membrane of the exciter, and achieve the effect of wide synthetic jet, simple structure and small volume

Active Publication Date: 2008-04-16
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: aiming at the technical problems existing in the existing synthetic jet actuator, the present invention provides a simple and novel structure that can effectively solve the vibration of the actuator caused by the pressure difference between the controlled flow field and the ambient flow field. Membrane ballast problem, and a single-membrane, dual-cavity, dual-port synthetic jet actuator that can make full use of the vibration radiation energy of the vibrating membrane

Method used

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  • Synthetic jetting excitor with single-membrane, double openings and double cavities
  • Synthetic jetting excitor with single-membrane, double openings and double cavities
  • Synthetic jetting excitor with single-membrane, double openings and double cavities

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Embodiment 1

[0037] Embodiment 1: as image 3 with Figure 4 As shown, the single-membrane double-cavity double-port synthetic jet actuator of the present invention includes a vibrating membrane 12, a first cavity 13 and a second cavity 14, and between the first cavity 13 and the second cavity 14 Separated by the vibrating membrane 12 to form independent cavities, the first cavity 13 and the second cavity 14 are respectively provided with a first outlet 15 and a second outlet 16 . Wherein, the vibration drive of the vibrating membrane 12 can be any one of piezoelectric, ferroelectric, electromagnetic, electrostatic, piston and other driving methods, the material of the vibrating membrane 12 can be elastic material, flexible material or composite material, and the shape of the vibrating membrane 12 It can be designed in any shape as required, such as circular or rectangular; the first cavity 13 and the second cavity 14 can be designed in any shape as required and the shape of the vibrating...

Embodiment 2

[0039] Embodiment 2: as Image 6 As shown, in this embodiment, on the basis of Embodiment 1, a flow regulating slider 18 is added between the first outlet 15 and the second outlet 16 . The flow regulating slider 18 can adopt different configurations, such as a boss shape, a trapezoid, a prism, a rectangle or other irregular shapes, and the material of the flow regulating slider 18 is a non-flexible hard material, which is suitable for using micro Manufactured with materials and processes compatible with micro-mechanical technology, the flow regulating slider 18 is located between the first outlet 15 and the second outlet 16 of the actuator, and can slide left and right along the horizontal direction under control.

[0040] Working principle: when the flow adjustment slider 18 slides to the first outlet 15 on the left, see Image 6 , the outlet area of ​​the first outlet 15 decreases, and the area of ​​the second outlet 16 increases accordingly. Under the condition of constant...

Embodiment 3

[0041] Embodiment 3: as Figure 7 As shown, the structure of this embodiment is basically the same as that of Embodiment 2, the difference is that the configuration of the flow regulation slider 18 is different, and its structure and working principle are shown as Figure 7 shown. Flow regulation slide block 18 can adopt different configurations, take boss configuration as example (as Figure 7 ), its working principle is: use the blocking effect of the boss to reduce the mutual entrainment and offset effect of the two adjacent jets at the outlet 15 and 16 and impel it to entrain more fluid around it, and use the Coanda effect of the jet to pass through the boss Guiding the fusion of two adjacent jets makes the synthetic jet 17 wider and more energetic. The working parameters of the exciter in embodiment 3 are the same as those in embodiment 1. Figure 11 The synthetic jet 17 velocity vector diagram is used for the single-membrane, double-cavity, and double-port synthetic j...

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Abstract

The invention comprises a vibration diaphragm, and first and second cavities separated via the vibration diaphragm. First and second outlets are disposed on the first and second cavities separately. The invention can solve the ballast problem of the driver vibration diaphragm caused by the differential pressure between the controlled flow field and the environmental flow field.

Description

technical field [0001] The invention mainly relates to the technical field of fluid transmission and control, in particular to a single-membrane, double-cavity, and double-port synthetic jet actuator for synthesizing zero-mass jets. Background technique [0002] Synthetic jet is to use the vibration of the vibrating diaphragm in the chamber of synthetic jet exciter (such as piezoelectric, ferroelectric, electromagnetic and electrostatic, or piston drive), to generate a series of unsteady vortices that continuously expand outward at the exit aperture of the exciter. A ring (or pair of vortices), which acts like a jet against the main flow. The remarkable feature of synthetic jet technology is that it does not need to introduce additional mass into the flow field, but uses the fluid in the controlled flow field to "synthesize" the jet, so it is also called "zero mass jet" and "self-coupling jet". ". In the field of fluid transmission and flow control, such as micropumps, flo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15D1/08
Inventor 罗振兵夏智勋刘冰
Owner NAT UNIV OF DEFENSE TECH
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