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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 in the direction of liquid injection devices, injection devices, injection devices, etc., can solve the problems of high manufacturing cost, complex nozzle structure, and poor nozzle atomization effect, and achieve simple structure, Good atomization effect

Active Publication Date: 2011-04-20
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

Examples

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Effect test

Embodiment 1

[0025] Example one: Such as figure 1 , 2 As shown in Fig. 3, a self-excited oscillating jet impinging nozzle used for the atomization of complex fluids of the present invention is mainly composed of a liquid collection chamber housing 1, an injection panel 2, a sealing gasket 3 and a resonance cavity housing 4. Figure 4 , 5 It is a liquid collection chamber housing 1 composed of a liquid collection chamber inlet 11 and a liquid collection chamber 12. Image 6 , 7 It is the injection panel 2 with two injection holes 21, and the injection holes are arranged symmetrically at a certain angle with the axis of the injection panel 2. There are two injection hole inlets 22 on the other side of the injection panel. Figure 8 It is a resonant cavity housing 4, on which a resonant cavity 41 and a resonant cavity entrance 42 are provided. The liquid collection chamber housing 1 and the injection panel 2 are connected by bolts in a flange manner. The liquid collection chamber housing 1 and...

Embodiment 2

[0027] Embodiment two: A self-excited oscillating jet impinging nozzle for the atomization of complex fluids, the second embodiment is as Picture 10 , 11 As shown in Figure 12, the main difference between the second embodiment and the first embodiment is that three nozzle holes 21 are evenly arranged at 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-oscillating jets impinging 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 both tapered channels (such as Picture 12 ). Since the shear rate of fluid flowing along the axial direction in the tapered channel is increased, it has a thinning effect on complex fluids with shear thinning properties. Both the nozzle hole 21 and the resonant cavity inlet 42 are designed in the form of a tapered channel, w...

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Abstract

The invention relates to a self-oscillation jet impact-type nozzle for atomizing complex fluids, comprising a fluid collection cavity shell, an injection panel and a resonant cavity shell, wherein the center of the upper part of the fluid collection cavity shell is connected with a supply pipeline through a threaded hole; the fluid collection cavity shell and the injection panel are connected through a flange and are sealed by using a sealing gasket; a cavity between the fluid collection cavity shell and the injection panel is a fluid collection cavity; the center of the bottom of the injection panel is provided with a truncated cone-shaped indent space; two or more spray orifices are symmetrically arranged on the side surface vertical to the truncated cone-shaped indent space; the axes of the spray orifices form certain angle with the central axis of the injection panel, and the axes of all the spray orifices are intersected at one point on the central axis of the injection panel; the side surface of a central truncated cone at the upper part of the injection panel is provided with spray orifice inlets; the spray orifice inlets are provided with internal threads; the resonant cavity shell is provided with resonant cavity inlets; the outer surface of the resonant cavity shell is provided with an external thread; the resonant cavity shell is connected with the injection panel through the internal threads of the spray orifice inlets; and two or more resonant cavities are formed between the resonant cavity shell and the injection panel.

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 Applications(China)
IPC IPC(8): B05B1/14B05B1/34
CPCF02K9/44B05B1/26B05B17/04F02K9/58F02K9/56B05B1/08
Inventor 杨立军富庆飞谷彬屈元元
Owner BEIHANG UNIV
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