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A Closed-Loop Adaptive Adjustable Ejector and Rocket Nozzle

A self-adaptive adjustment and ejector technology, applied in the field of ejectors, can solve the problems of inability to change the flow rate and flow rate of working fluid and ejection fluid, small application range, waste of resources, etc., so as to improve the mixed output effect and improve the work efficiency. Scope, the effect of strengthening the blending ability

Active Publication Date: 2020-10-13
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing ejector lacks the ability of closed-loop adjustable mixing, and the structure is fixed and cannot be adjusted, so it can only obtain better performance under the design working conditions
When it is in the design working condition, the working fluid and the ejection fluid can be better matched and have better suction capacity; when the working state of the ejector changes, such as when passing through different types of working fluid and ejection fluid, It cannot actively enhance the mixing effect, nor can it change the flow rate and flow rate of the working fluid and ejection fluid, so the scope of application is small, which virtually causes a large waste of resources

Method used

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  • A Closed-Loop Adaptive Adjustable Ejector and Rocket Nozzle
  • A Closed-Loop Adaptive Adjustable Ejector and Rocket Nozzle
  • A Closed-Loop Adaptive Adjustable Ejector and Rocket Nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] as attached Figure 1-3Shown is a closed-loop self-adaptive adjustable ejector. In this embodiment, the ejector has an axisymmetric nozzle configuration as a whole, and each component pipeline is cylindrical, including a fixed connection with an upstream device and a The working fluid upstream pipeline 15 whose overall shape is tapered, the upstream device can be rockets, aircraft and other spacecraft components, and can also be industrial equipment components; the tail of the working fluid upstream pipeline 15 extends into the injection fluid channel 3 Inside, and leave a certain gap to form a channel for the injection fluid, the injection fluid channel 3 is sequentially sealed and connected with the equivalent section 11 and the expansion section 13 along the length direction of the injector, the injection fluid channel 3 The expansion section 13 is in the shape of a trumpet with openings at both ends, and the equivalent section 11 is in the shape of a hollow cylinder...

Embodiment 2

[0049] as attached Figure 4-5 Shown is a closed-loop self-adaptive adjustable ejector. In this embodiment, the ejector as a whole has a two-dimensional nozzle configuration, and each component pipeline is in the shape of a hollow column, including a working unit fixedly connected to an upstream device. The fluid upstream pipeline 15, the tail of the working fluid upstream pipeline 15 extends into the injection fluid channel 3, and the injection fluid channel 3 is sequentially sealed and connected to the equivalent section 11 and the expansion section along the length direction of the injector 13. The working fluid upstream pipeline 15 is sequentially provided with a coaxial and interconnected working fluid nozzle straight section 16, a working fluid nozzle converging section 1, a working fluid nozzle throat 5 and a working fluid nozzle along the central axis. Expansion segment 9;

[0050] The middle part of the expansion section 9 of the working fluid nozzle is provided with...

Embodiment 3

[0054] On the basis of Embodiment 1 or Embodiment 2, the present invention also provides a rocket-based combined cycle engine adaptive rocket nozzle, including a closed-loop adaptive adjustment as described in any one of Embodiment 1 or Embodiment 2 ejector.

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PUM

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Abstract

The invention discloses a closed-loop self-adaptive adjustment ejector, which comprises a working fluid upstream pipeline, an ejecting fluid channel, an equivalent section and an expansion section. Aninner hole of the working fluid upstream pipeline is sequentially provided with a working fluid nozzle straight section, a working fluid nozzle contraction section, a working fluid nozzle throat anda working fluid nozzle expansion section along the central axis; a working fluid mixing channel communicating the working fluid nozzle expansion section with the ejecting fluid channel is formed in the middle of the working fluid nozzle expansion section towards the ejecting fluid channel; and a mixing control channel communicating the working fluid nozzle contraction section with the working fluid mixing channel is formed in the middle of the working fluid nozzle contraction section towards the working fluid mixing channel. The working fluid mixing channel is communicated with the working fluid nozzle expansion section and the ejecting fluid channel, the working fluid can be sucked into the ejecting fluid channel, namely the ejecting fluid channel, from the working fluid upstream pipelineby utilizing the pressure difference between the working fluid and the ejecting fluid, so that the mixing capacity of two air flows is enhanced, and the ejecting effect of the ejector is changed.

Description

technical field [0001] The invention relates to the technical field of ejectors, in particular to a closed-loop adaptively adjusted ejector and a rocket nozzle. Background technique [0002] The ejector is a mechanical device that mixes the high total pressure airflow and the low total pressure airflow. Since it has no complicated rotating parts and can be used continuously and stably, it has attracted more and more attention from engineers. It is used in industrial production play an increasing role. [0003] The existing ejector lacks the ability of closed-loop adjustable mixing, and the structure is fixed and cannot be adjusted, so it can only obtain better performance under the design working conditions. When it is in the design working condition, the working fluid and the ejection fluid can be better matched and have better suction capacity; when the working state of the ejector changes, such as when passing through different types of working fluid and ejection fluid, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K1/38F02K9/97
CPCF02K1/386F02K9/97
Inventor 顾瑞孙明波蔡尊陈健
Owner NAT UNIV OF DEFENSE TECH