A Hydrazine Arc Thruster Ignition System to Suppress Large Fluctuation of Pressure

Abstract

A hydrazine arc thruster ignition system that suppresses large pressure fluctuations, including a diaphragm tank (1), a propellant filter (2), a propellant throttle orifice (3), a gas generator (4), and an arc thruster (5), the system solves the problem of frequent and large fluctuations in the combustion pressure of the gas generator due to the precipitation of bubbles in the propellant and the large fluctuations in the combustion pressure due to changes in thermal resistance before and after arcing, and can greatly reduce the number of fluctuations in the combustion pressure of the gas generator and amplitude, to avoid changes in the arc attachment mode during the ignition of the arc thruster, thereby reducing damage to the electrode and prolonging the life of the thruster.

Description

technical field [0001] The invention relates to an ignition system of a hydrazine arc thruster capable of suppressing large pressure fluctuations, and belongs to the field of electric propulsion ignition systems. Background technique [0002] The hydrazine arc thruster is an electrothermal electric propulsion technology with good development prospects. It is compatible with the mature mono-element propulsion system used on the planet, sharing a set of storage and supply systems, and the specific impulse of the hydrazine arc thruster is much higher than that of a single-unit The component thruster can greatly reduce the consumption and carrying capacity of propellant. Therefore, the hydrazine arc thruster has very obvious advantages as the propulsion power system for maintaining the north-south position of the geosynchronous orbit satellite. Due to the high life requirements of geosynchronous orbit satellites, in order to meet the mission requirements, the hydrazine arc thru...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the invention is: in the current prior art, the hydrazine arc ignition system frequently has large pressure fluctuations caused by air bubbles and fuel pressure fluctuations caused by changes in thermal resistance before and after arcing, which seriously affects the life of the arc thruster and For the application of space missions, a hydrazine arc thruster ignition system that suppresses large fluctuations in pressure is proposed, which greatly reduces the number and magnitude of large fluctuations in combustion pressure during lifetime ignition, thereby increasing the service life of arc thrusters to meet the needs of space missions

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