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Device for exciting high-speed and large-area ionic wind

An excitation device and ion wind technology, applied in corona discharge devices, electrical components, circuits, etc., can solve the problems of low speed and small action area of ​​ion wind excitation devices, and achieve the effects of reducing resistance, facilitating accumulation, and stabilizing discharge

Inactive Publication Date: 2009-11-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low speed and small action area of ​​the existing ion wind excitation device, the object of the present invention is to provide a cascaded multi-needle-ring electrode ion wind excitation device, which can obtain high-speed, large-area ion wind

Method used

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  • Device for exciting high-speed and large-area ionic wind
  • Device for exciting high-speed and large-area ionic wind
  • Device for exciting high-speed and large-area ionic wind

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 2 , image 3 As shown, a kind of cascaded multi-needle-ring electrode ion wind excitation device for generating high-speed, large-area ion wind of the present invention, four multi-needle ring electrodes 10 and one ring electrode 5 are embedded with an inner diameter of 19mm, and the wall Thickness is 5mm, and length is in the plexiglass barrel 4 of 21mm. The needle electrodes 6 used are all steel needles with a tip diameter of about 50 μm, which are made of ordinary steel needles by electrochemical corrosion. The material of the ring electrode 5 is brass, and four cylinders 9 with a height of 3 mm (uniformly distributed along the circumference) are processed inside, and a groove 8 with a width of 0.8 mm and a depth of 1 mm is left at the top for installation. Needle electrode 6. The multi-needle ring electrode 10 is integrated by the needle electrode 6 of the original rear stage and the ring electrode 5 of the previous stage, which fully utilizes the...

Embodiment 2

[0029] Such as figure 2 , image 3 As shown, another cascaded multi-needle ring electrode ion wind excitation device for generating high-speed, large-area ion wind of the present invention, six multi-needle ring electrodes 10 and one ring electrode 5 are embedded with an inner diameter of 19mm, and the wall Thickness is 5mm, and length is in the plexiglass barrel 4 of 16mm. The needle electrode 6 used is made of corrosion-resistant silicon crystal material by laser etching, and its tip diameter is about 5 μm.

[0030] The ring electrode 5 of each two-stage multi-needle ring electrode is connected in series with the current-limiting resistor R through a conductor 7, and then connected in parallel with a voltage dividing capacitor C to form six series voltage dividing devices, which are connected to the ring electrode near the entrance. The voltage dividing capacitor C is connected to the DC high voltage source -HV, and the voltage dividing capacitor C connected to the electr...

Embodiment 3

[0033] Such as figure 2 , Figure 4As shown, another cascaded multi-needle ring electrode ion wind excitation device for generating high-speed, large-area ion wind of the present invention, six multi-needle ring electrodes 10 and one ring electrode 5 are embedded with an inner diameter of 45mm, and the wall Thickness is 5mm, and length is in the plexiglass barrel 4 of 16mm. The needle electrode 6 used is made of corrosion-resistant silicon crystal material by laser etching, and its tip diameter is about 5 μm.

[0034] The ring electrode 5 is made of brass, and 8 cylinders 9 with a height of 3 mm (uniformly distributed along the circumference) are processed inside, and a groove 8 with a width of 0.6 mm and a depth of 1 mm is left at the top for installation. Needle electrode 6. Enlarging the inner diameter of the plexiglass tube and the number of needle electrodes 6 at each stage can increase the action range of the ion wind and control the fluid flow.

[0035] The ring el...

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Abstract

The invention discloses a device for exciting high-speed and large-area ionic wind, which comprises an ionic wind exciting area cylinder body, an inlet and an outlet at two ends. Multiple-stage series needle-ring electrodes are arranged in the cylinder body. The device is characterized in that a needle electrode of a post stage and a ring electrode of a previous stage are combined to form an integral multi-needle ring electrode, and the needle electrode and the ring electrode of the multi-needle ring electrode of each two stages form an electrode spacing; the ring electrodes of the multi-needle ring electrode of each two stages are connected in series with a current-limiting resistor outside the cylinder body through a conductor respectively, and then are connected in parallel with a voltage-dividing capacitor to form a discharge loop; and the voltage-dividing capacitors are mutually connected in series, the voltage-dividing capacitor connected with the ring electrode close to the inlet is connected with a direct-current high voltage source, the voltage-dividing capacitor connected with the ring electrode close to the outlet is grounded, and the ring electrode close to the outlet is not provided with a needle electrode and is grounded directly through a conductor. The device can obtain high-speed and large-area ionic wind, and can be applied in various fields of enhanced heat transfer, micro air pumps, air purification and the like.

Description

technical field [0001] The invention relates to an ion wind excitation device applied to heat transfer enhancement, micro gas pump and the like, in particular to a cascaded needle-ring electrode ion wind excitation device for generating high-speed, large-area ion wind. Background technique [0002] Ion wind, that is, "electrically induced secondary flow", refers to the fact that in an uneven electric field, when a discharge occurs, a large number of ion jets move near electrodes with relatively large curvatures, and the ion jets strongly disturb the flow of the surrounding fluid, forming Fluid movement in the direction from a more curved electrode to a less curved electrode. The ionic wind generated by corona discharge in the air has many application prospects such as enhanced heat transfer, micro gas pump, boundary fluid control, and air purification. At present, the research at home and abroad is limited to obtaining local high-speed ion wind, and has not obtained large-a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T19/00H01T23/00
Inventor 杨兰均邱炜袁均祥夏令志童金禄赵宏博
Owner XI AN JIAOTONG UNIV
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