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Self-oscillation jet impact-type nozzle for atomizing complex fluids

A self-excited oscillating jet and impact technology, which is applied to liquid spray devices, spray devices, spray devices, etc., can solve the problems of high manufacturing cost, complex nozzle structure, and poor nozzle atomization effect, and achieve good atomization. Effects, effects with a simple structure

Active Publication Date: 2013-05-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional Newtonian fluid atomization methods and conventional nozzles (such as pneumatic atomization nozzles, pintle nozzles, etc.) are still used in liquid rocket engines for the atomization of complex fluids. Due to the characteristics of these conventional atomization methods and nozzles, the atomization effect is not very good, and these nozzles are often complex in structure and high in manufacturing cost

Method used

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  • Self-oscillation jet impact-type nozzle for atomizing complex fluids
  • Self-oscillation jet impact-type nozzle for atomizing complex fluids
  • Self-oscillation jet impact-type nozzle for atomizing complex fluids

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Embodiment 1

[0025] Embodiment one: Such as figure 1 , 2 , 3, the present invention is a self-excited oscillating jet impingement nozzle for complex fluid atomization, which is mainly composed of a liquid collection cavity shell 1, an injection panel 2, a sealing gasket 3 and a resonant cavity shell 4. Figure 4 , 5 It is the liquid collecting chamber shell 1, which is composed of the liquid collecting chamber inlet 11 and the liquid collecting chamber 12. Image 6 , 7 It is an injection panel 2 with two injection holes 21 arranged symmetrically at a certain angle to the axis of the injection panel 2 . There are two orifice inlets 22 on the other side of the injection panel. Figure 8 It is the resonant cavity housing 4 , on which a resonant cavity 41 and a resonant cavity inlet 42 are arranged. The housing 1 of the liquid collection chamber is connected to the injection panel 2 in a flanged manner with bolts. The sealing gasket 3 is used to seal the liquid collection chamber housi...

Embodiment 2

[0027] Embodiment two: A self-excited oscillating jet impact nozzle for complex fluid atomization, the second embodiment is as Figure 10 , 11 , 12, the main difference between the second embodiment and the first embodiment is that three nozzle holes 21 are evenly arranged on the bottom of the injection panel 2, and correspondingly there are three injection hole inlets 22 on the upper part of the injection panel. In this way, three self-excited oscillating jet impact nozzles are formed.

[0028] Another difference between the second embodiment and the first embodiment is that the nozzle hole 21 and the resonant cavity inlet 42 are tapered channels (such as Figure 12 ). Since the shear rate of the fluid flow along the axial direction in the tapered channel is increased, there is a thinning effect on the complex fluid with shear thinning properties. Both the nozzle hole 21 and the resonant cavity inlet 42 are designed in the form of a tapered channel, which reduces the app...

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Abstract

A self-excitation oscillation jet impact nozzle for complex fluid atomization comprises a liquid collecting cavity housing (1), a jet faceplate (2) and a resonant cavity housing (4). A screw hole, which is connected to a supplying pipeline, is provided in the upper center of the liquid collecting cavity housing. The liquid collecting cavity housing is coupled with the jet faceplate by a flange and is sealed with a sealing gasket. A hollow cavity between the liquid collecting cavity housing and the jet faceplate is a liquid collecting cavity (12). A frustum cone-like concave space (23) is provided in the bottom center of the jet faceplate. Two or more jet holes are symmetrically arranged perpendicularly to lateral surfaces of the frustum cone-like concave space. The axes of the jet holes make a certain angle with the center axis of the jet faceplate and all of the axes of the jet holes intersect in an intersection which belongs to the center axis of the jet faceplate. Jet-hole inlets (21) which comprise inner screws are provided in frustum cone side surfaces at the upper center of the jet faceplate. A resonant cavity inlet (42) is provided on the resonant cavity housing which comprises outer screws and is coupled with the jet faceplate by the inner screws of the jet-hole inlets, and two or more resonant cavities (41) is formed between the resonant cavity housing and the jet faceplate. The impact nozzle achieves better atomization effect for complex fluid atomization and improves the combustion efficiency and specific impulse of the liquid rocket engine.

Description

technical field [0001] The invention relates to a self-excited oscillating jet impacting nozzle for complex fluid atomization, which is mainly used in the fields of liquid rocket engine thrust chamber, pre-combustion chamber injector design, liquid atomization and the like. Background technique [0002] Liquid jet impingement is a very effective atomization and mixing method. In the rocket engine thrust chamber using liquid propellants, the impact nozzle has also been widely used, such as the F-1 engine in the "Saturn" -5 launch vehicle used by the American Apollo moon landing program. of the nozzle. Impingement nozzles use the dynamic head of the propellant to destabilize another jet of propellant moving in the opposite direction, thereby breaking up the liquid into ribbons and droplets. [0003] With the pursuit of high-energy energy for aerospace power devices, propellants containing metal particles have become an important development direction of chemical propellants....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05B1/14B05B1/34
CPCB05B1/26B05B1/08F02K9/56F02K9/58B05B17/04F02K9/44
Inventor 杨立军富庆飞谷彬屈元元
Owner BEIHANG UNIV