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Synthetic jet actuator with double films, single chamber and single spout

A technology of synthetic jet and single nozzle, applied in the aerospace field, can solve the problem of low energy conversion ability, and achieve the effect of improving the ability of kinetic energy, improving stall characteristics, and improving the ability of energy conversion

Inactive Publication Date: 2010-06-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency of low energy conversion capacity existing in the prior art, the present invention proposes a synthetic jet actuator with double membrane, single cavity and single nozzle

Method used

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  • Synthetic jet actuator with double films, single chamber and single spout
  • Synthetic jet actuator with double films, single chamber and single spout
  • Synthetic jet actuator with double films, single chamber and single spout

Examples

Experimental program
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Effect test

Embodiment 1

[0023] This embodiment includes two membrane supports 2, two bow-shaped vibrating membranes 6, a box body 3 and two pairs of electrode wires, and the outer edges of the two bow-shaped vibrating membranes 6 are bonded and fixed on the mounting surface at one end of the inner hole of the membrane bracket 2 respectively. 4 on. The two membrane supports 2 on which the bow-shaped vibrating membrane 6 is fixed are respectively located at both ends of the box body 3 and are fixedly connected with the box body.

[0024] The bow-shaped vibrating film 6 includes a PZT ceramic sheet 9 and a copper foil sheet 8 . The PZT ceramic sheet 9 is a circular sheet whose outer diameter is smaller than the inner diameter of the membrane support 2 . The copper foil 8 is circular, and its outer diameter is the same as the mounting surface of the stepped arcuate vibrating film 6 on the inner hole of the support 2; the center of the copper foil is a protruding trapezoidal platform. The end surface of...

Embodiment 2

[0029] This embodiment includes two membrane supports 2, two bow-shaped vibrating membranes 6, a box body 3 and two pairs of electrode wires, and the outer edges of the two bow-shaped vibrating membranes 6 are bonded and fixed on the mounting surface at one end of the inner hole of the membrane bracket 2 respectively. 4 on. The two membrane supports 2 on which the bow-shaped vibrating membrane 6 is fixed are respectively located at both ends of the box body 3 and are fixedly connected with the box body.

[0030] The bow-shaped vibrating film 6 includes a PZT ceramic sheet 9 and a copper foil sheet 8 . The PZT ceramic sheet 9 is a circular sheet whose outer diameter is smaller than the inner diameter of the membrane support 2 . The copper foil 8 is circular, and its outer diameter is the same as the mounting surface of the stepped arcuate vibrating film 6 on the inner hole of the support 2; the center of the copper foil is a protruding trapezoidal platform. The end surface of...

Embodiment 3

[0035] This embodiment includes two membrane supports 2, two bow-shaped vibrating membranes 6, a box body 3 and two pairs of electrode wires, and the outer edges of the two bow-shaped vibrating membranes 6 are bonded and fixed on the mounting surface at one end of the inner hole of the membrane bracket 2 respectively. 4 on. The two membrane supports 2 on which the bow-shaped vibrating membrane 6 is fixed are respectively located at both ends of the box body 3 and are fixedly connected with the box body.

[0036] The bow-shaped vibrating film 6 includes a PZT ceramic sheet 9 and a copper foil sheet 8 . The PZT ceramic sheet 9 is a circular sheet whose outer diameter is smaller than the inner diameter of the membrane support 2 . The copper foil 8 is circular, and its outer diameter is the same as the mounting surface of the stepped arcuate vibrating film 6 on the inner hole of the support 2; the center of the copper foil is a protruding trapezoidal platform. The end surface of...

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Abstract

The invention relates to a synthetic jet actuator with double films, a single chamber and a single spout. An installing surface (4) of a vibration film (6) is arranged on the surface of an inner hole at one end of a film bracket (2); the arched vibration film (6) formed by a PZT ceramic sheet (9) and an arched copper foil sheet (8) is fixed on the installing surface (4); the film brackets (2) are respectively fixed at both ends of a box body (3); the ratio of the diameter of the PZT ceramic sheet (9) to the diameter of the copper foil sheet (8) is 0.4-0.8; the ratio of the diameter of a trapezoid lower bottom of the copper foil sheet (8) to the diameter of the copper foil sheet is 0.3-0.7; the ratio of a trapezoid upper bottom of the copper foil sheet (8) to the diameter of the trapezoid lower bottom of the copper foil sheet is 0.4-0.95; and the trapezoid angle is 22 degrees-56 degrees. The invention can obtain higher amount of distortion, improves the energy conversion capacity, enables the spout to generate larger kinetic energy, and has good application prospects in the aspects of improving the lifting force of airfoils, improving the stalling characteristics of airfoils and enhancing mixing.

Description

technical field [0001] The invention relates to the aerospace field, and relates to a double-membrane single-cavity single-spout synthetic jet actuator. Background technique [0002] Synthetic jet technology is a new type of flow control technology that appeared in the 1990s. Synthetic jet technology can effectively delay separation and delay stall, so as to achieve the purpose of greatly increasing lift, reducing drag, and improving flight performance; it can realize the control of thrust vector; it can enhance mixing and improve the control force of micro aircraft; it can also realize The control of the precursor vortex and the dynamic stall control of the helicopter rotor, after nearly a decade of development, have become a research hotspot in the aerospace field of various countries, and it is very likely to develop into a major breakthrough technology in the field of active flow control. [0003] An important challenge in realizing flow control in synthetic jet technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/28F04B45/047H02N2/18
Inventor 郝礼书乔志德韩忠华宋文萍
Owner NORTHWESTERN POLYTECHNICAL UNIV
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