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Pulsating gas generating device and unstable combustion experimental equipment

A technology of gas generating device and experimental equipment, which is applied to jet propulsion devices, rocket engine devices, mechanical equipment, etc., can solve problems such as explosion, shortened engine life, and damage to engine components, and achieve good experimental results, simple structure, and convenient installation Effect

Active Publication Date: 2022-05-10
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When an unstable combustion chamber occurs in the combustion chamber, parameters such as the pressure, flow rate, and heat release rate of the combustion chamber fluctuate sharply, causing damage to engine components, shortening the life of the engine, and even causing an explosion in severe cases, thereby limiting the current high-thrust liquid rocket engine. Development process
[0003] The existing methods for studying the mechanism of unstable combustion usually affect the combustion process directly through sound field disturbance or controlling the equivalence ratio pulsation, but the research results are not very satisfactory

Method used

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  • Pulsating gas generating device and unstable combustion experimental equipment
  • Pulsating gas generating device and unstable combustion experimental equipment
  • Pulsating gas generating device and unstable combustion experimental equipment

Examples

Experimental program
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Embodiment 1

[0042] see figure 1 , figure 2 and image 3 , this embodiment provides a pulsating gas generating device, which is applied to unstable combustion experimental equipment and used for research on unstable combustion experiments. Wherein, the unstable combustion experimental equipment includes a rocket engine model combustion chamber, and the rocket engine model combustion chamber has a premix chamber 500 and a burner 400 .

[0043] In this implementation, the pulsating gas generating device includes a control module 100 and a pulsating airflow generating module 200 , the control module 100 and the pulsating airflow generating module 200 are electrically connected to control the pulsating airflow generating module 200 to operate.

[0044] Please also refer to Figure 6 Specifically, the control module 100 includes a control unit 110 , a signal generator 120 and a power amplifier 130 that are electrically connected in sequence. The pulsating airflow generation module 200 incl...

Embodiment 2

[0071] see Figure 6 and Figure 9 , this embodiment provides a pulsating gas generating device, which is applied to unstable combustion experimental equipment and used for research on unstable combustion.

[0072] In this embodiment, the base 210 includes a seat body 210a, two mounting plates 210b, and a plurality of adjusting components 210d. Wherein, the seat body 210a is provided with a cavity 212, and the seat body 210a is provided with an air inlet 211 and an air outlet 213 communicating with the cavity 212, wherein, the design scheme of the cavity 212, the air inlet 211 and the air outlet 213 Continue to use the solution in the first implementation above, and will not repeat it in detail in this embodiment.

[0073] Further, the two mounting plates 210b are respectively arranged on both sides of the base body 210a, and the mounting plate 210b and the base body 210a are sealed and connected by a retractable bellows 210c, and the two mounting plates 210b are away from t...

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Abstract

The invention provides a pulsating gas generating device and unstable combustion experimental equipment, and relates to the technical field of aerospace equipment. The pulsating gas generation device comprises a control module and a pulsating gas flow generation module; the pulse airflow generation module comprises a base and two vibrators, the two vibrators are oppositely arranged on the two sides of the base and connected with the control module, a relatively-sealed vibration cavity is formed between the two vibrators and the base, the base is further provided with an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the vibration cavity. The air inlet is externally connected with an auxiliary air path for providing auxiliary airflow, and the air outlet is connected with an injection device in a combustion chamber of the rocket engine model. The pulsating gas generating device provides experimental conditions for assisting pulsating gas flow disturbance to a combustion instability mechanism, the experimental effect is good, and the pulsating gas generating device is simple in overall structure, convenient to install and low in cost.

Description

technical field [0001] The application relates to the technical field of aerospace equipment, in particular to a pulsating gas generating device and unstable combustion experimental equipment. Background technique [0002] Unstable combustion is one of the major scientific and technical problems faced in the development of aero-engines and liquid rocket engines. During the working process of the liquid rocket engine, combustion instability is very easy to occur in the combustion chamber. Combustion instability refers to the periodic pressure pulsation and the pulsation amplitude exceeds 5% of the combustion chamber pressure. When an unstable combustion chamber occurs in the combustion chamber, parameters such as the pressure, flow rate, and heat release rate of the combustion chamber fluctuate sharply, causing damage to engine components, shortening the life of the engine, and even causing an explosion in severe cases, thereby limiting the current high-thrust liquid rocket ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/96
CPCF02K9/96
Inventor 杨立军李敬轩刘晓康宋艺伟张玥梁炫烨
Owner BEIHANG UNIV
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