High-pressure-intensity external pulse excitation device for T-shaped burner

A pulse excitation and burner technology, applied in jet propulsion, rocket engine, machine/engine, etc., can solve the problems of difficult self-excited oscillation, inability to accurately measure the propellant pressure coupling response function, etc.

Inactive Publication Date: 2013-05-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for composite propellants containing a large number of metal particles, due to the existence of combustion product condensed phase particle damping, it is difficult for the experimental system to generate self-excited oscillations, so that the pressure coupling response function of the propellant cannot be accurately measured

Method used

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  • High-pressure-intensity external pulse excitation device for T-shaped burner
  • High-pressure-intensity external pulse excitation device for T-shaped burner
  • High-pressure-intensity external pulse excitation device for T-shaped burner

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Embodiment Construction

[0021] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0022] In this embodiment, under the condition that the working pressure of the T-shaped burner is 10MPa, according to the working time of the propellant, the working condition of the pulse trigger excitation is observed through a high-precision, multi-channel ignition timing control device. During the experiment, a total of two pulse-triggered excitations were carried out, the first time was at the middle of the T-shaped burner operation, and the second time was at the moment when the propellant had just finished burning. The amount of ignition powder in the pulser is 5g, and a high-temperature gas of 40MPa can be generated in the pulser.

[0023] This embodiment includes a pulser nozzle 1, a pulser baffle 3, a plug 4, an O-ring 5, a sealing pressure bearing piece 6, an insulating sleeve 7, a pressure measuring seat 8, a pulser housing 9, and an ignition sealing...

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Abstract

The invention relates to a high-pressure-intensity external pulse excitation device for a T-shaped burner. In a burning chamber of the pulse excitation device, an ignition head is utilized for igniting the set amount of black powder, so that fuel gas at the required pressure intensity and temperature can be generated (the pressure intensity needs to be higher than the balanced pressure intensity in the T-shaped burner), a sealing plug is propped open, and the black powder enters the T-shaped burner through a pulse device spray opening, so the required pressure intensity disturbance (i.e. pulse) is formed. Under the general conditions, the pulse device can input gas-particle mixtures completely identical to the burning products generated by the T-shaped burner charged with the powder, and in addition, the fundamental frequency oscillation mode excitation can be ensured.

Description

technical field [0001] The invention belongs to a high-pressure external pulse excitation device, in particular to a high-pressure external pulse excitation device for a T-shaped burner. Background technique [0002] As one of the important factors affecting combustion instability in solid rocket motors, the pressure coupling characteristics of composite propellants have been paid attention by researchers at home and abroad. For solid propellants, the pressure coupling characteristics are usually characterized by the pressure coupling response function, and the pressure coupling response function needs to be obtained by means of experimental measurement. At present, most experimental tests use the T-shaped burner method. The main feature of the T-shaped burner is that the nozzle is opened in the middle of the combustion chamber, which can reduce the loss of sound energy and easily stimulate oscillation. T-shaped burners usually use a tubular combustion chamber. Two propell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/34
Inventor 刘佩进金秉宁
Owner NORTHWESTERN POLYTECHNICAL UNIV
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