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A pulse-sweeping type fluid oscillation exciter

A technology of oscillators and exciters, applied in mechanical equipment, circuit components, etc.

Active Publication Date: 2021-08-27
AERO ENGINE ACAD OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Neither of the above two oscillators can form an exciting jet with oscillating changes in velocity and direction at the outlet

Method used

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  • A pulse-sweeping type fluid oscillation exciter
  • A pulse-sweeping type fluid oscillation exciter
  • A pulse-sweeping type fluid oscillation exciter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] refer to Figure 1-Figure 3 , a pulse-sweeping type fluid oscillation exciter, comprising a first part of the fluid oscillator 1, and at least one second part of the fluid oscillator 2, the first part of the fluid oscillator 1 includes a first part of the inlet 11, two first part of the outlet 12, and at least one first part feedback channel 13 for periodically making fluid go out alternately from the two outlets, the second part fluid oscillator 2 includes a second part inlet 21, a second part outlet 22, and At least one second-part feedback channel 23 for periodically changing the jet direction of the second-part outlet 22 , at least one first-part outlet 12 of the first-part fluid oscillator 1 is connected to the second-part fluid oscillator 2 .

[0030] In this embodiment, two types of fluid oscillators are fused to form a pulse-sweeping fluid oscillation exciter, so that an excitation jet with oscillating changes in velocity and direction is formed at the exit of t...

Embodiment 2

[0042] refer to Figure 5 , this embodiment is basically the same as Embodiment 1, the difference is that the number of the first part of the feedback channel 13 is one, and the first part of the inlet 11 is connected to the first side wall channel 14 and the second side wall The connecting portion of the wall channel 15 is provided with a first feedback port 31 and a second feedback port 32 , and the first feedback port 31 communicates with the second feedback port 32 through the first part of the feedback channel 13 .

[0043] In this embodiment, since there is only one first part of the feedback channel 13, the generation of its oscillation mainly relies on the propagation of compression waves and expansion waves at the speed of sound in the first part of the feedback channel 13. When the jet is close to the second side When the wall channel 15 is used, the entrainment effect of the jet makes the pressure of the second feedback port 32 drop, and the pressure drop generates ...

Embodiment 3

[0045] refer to Figure 6 , this embodiment is basically the same as Embodiment 1, the difference is that the first part of the fluid oscillator 1 includes a first sweeping fluid oscillator 41 and a splitter wedge 42, and the splitter wedge 42 is arranged on the first The outlet of the sweeping fluid oscillator 41, so that the outlet of the first sweeping fluid oscillator 41 is divided into a first outlet 121 and a second outlet 122, and the left and right side walls of the split wedge 42 vibrate with the first sweeping fluid oscillator A first side wall channel 14 and a second side wall channel 15 are formed between the left and right inner side walls of the outlet of the device 41 . In this embodiment, the first sweeping fluid oscillator 41 is transformed into a pulse fluid oscillator through the splitter wedge 42 .

[0046] The first sweeping fluid oscillator 41 includes a first flow chamber 43, and the first partial inlet 11 communicates with the first outlet 121 through ...

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PUM

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Abstract

The present disclosure provides a pulse-sweeping type fluid oscillation exciter, including a first part of a fluid oscillator, and at least one second part of a fluid oscillator, the first part of a fluid oscillator includes a first part inlet, two first part outlets, and at least one first partial feedback channel for periodically alternating fluid from the two outlets, the second partial fluid oscillator includes a second partial inlet, a second partial outlet, and at least one for periodically The second part of the feedback channel that changes the direction of the jet flow at the second part of the outlet, and at least one first part of the first part of the fluid oscillator is connected to the second part of the fluid oscillator. In this embodiment, two types of fluid oscillators are fused to form a pulse-sweeping fluid oscillation exciter, so that an excitation jet with oscillating changes in velocity and direction is formed at the exit of the exciter.

Description

technical field [0001] The present disclosure relates to a fluid oscillator, in particular to a pulse-sweeping type fluid oscillation exciter. Background technique [0002] Active flow control is to directly inject appropriate disturbance modes into the flow environment to couple with the internal modes of the system, so as to obtain high control benefits with small energy consumption, and play a "four-two-two" control role. Active flow control methods based on periodic non-steady-state excitation are more efficient than traditional passive control methods or steady-state blow-and-puff methods. These periodic unsteady disturbances can be generated by various exciters. Compared with other types of actuators, fluid oscillators do not have any moving parts and can produce an oscillating jet at the outlet under a certain steady-state inlet fluid pressure. Because its oscillating flow is completely self-excited and self-sustaining, relying entirely on its own internal fluid pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15C1/22
CPCF15C1/22
Inventor 王士奇宋汉强张翠珍
Owner AERO ENGINE ACAD OF CHINA