An arc heating device that can generate ultra-high-speed airflow

Abstract

The invention discloses an electric arc heating device capable of generating ultra-high-speed airflow. The electric arc heating device comprises a cathode, an anode jet tube, an insulating part and a metal sleeve. The cathode is fixed to the insulating part through an anode clamping piece, one end of the metal sleeve is connected with the insulating part, the other end of the metal sleeve is clamped with the anode jet tube, and the metal sleeve is provided with an air inlet and an exhaust port; the anode jet tube comprises a throat and an expansion section for energy conversion of a propellant, an air exhaust channel is formed in the position, close to the throat, of the expansion section of the anode jet tube and used for exhausting low-speed cold air close to the wall of the anode jet tube before the low-speed cold air is jet out of the jet tube, and the air exhaust channel is connected with the exhaust port; mass flowmeters are arranged outside the air inlet and the exhaust ports, and the mass flowmeter connected with the exhaust port is connected with an exhaust vacuum pump. The electric arc heating device can generate the ultra-high-speed airflow.

Description

technical field [0001] The invention relates to an arc heating device capable of generating ultra-high-speed air flow. Background technique [0002] With the development of the times, space control capabilities play an increasingly important role in a country's security. The weight of chemical fuel carried by chemical rockets accounts for more than 90% of the total weight of the vehicle, and the payload only accounts for about 1%. However, due to the limitation of the chemical energy of the propellant, it is difficult to increase its specific impulse. Therefore, chemical propellants are suitable for short-term, high-thrust propulsion tasks. Relatively speaking, electric rocket propulsion technology can obtain higher carrying efficiency, and is suitable for propulsion tasks with long-term, small and medium thrust, and high specific impulse. At present, for satellites of various purposes, in order to reduce weight and size, improve positioning accuracy, and extend operating ...

AI Technical Summary

Problems solved by technology

However, due to the high-temperature and high-speed airflow parameters such as the velocity of the high-temperature and high-speed airflow produced by the conventional arc heating thruster, the gradient of the change along the radial direction is extremely large, and the flow field is not uniform. The ultra-high-speed flow at the center of the nozzle outlet changes sharply to the sub- Sonic flow, which also limits the application of arc-heated thrusters in this field

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