High-temperature continuous nitrogen heater

Abstract

The invention provides a high-temperature continuous nitrogen heater. The high-temperature continuous nitrogen heater comprises a cylinder, a water cooling positive electrode, a water cooling negative electrode and a heating element; the heating element is mounted on the axis of the cylinder, and one end thereof is connected with the water cooling positive electrode through a slide transfer piece; the water cooling positive electrode is connected with a power supply by penetrating out of a water cooling end surface flange tightly connected to one end of the cylinder; the other end of the heating element penetrates out of a graphite baffle plate at the other end of the closed cylinder; upper and lower two water cooling negative electrodes mounted on the heating element through an electrode transfer disc are connected with the power supply after penetrating out of through holes in the wall of the cylinder; the heating element is a sandwich layer structure consisting of a graphite straight pipe on the outer layer and a graphite straight pipe with a spiral fin on the outer pipe wall on the inner layer; a spiral channel is formed between the outer-layer pipe and the inner-layer pipe through the spiral fin; and a through hole is formed in the slide transfer piece connected to one end of the heating element. The high-temperature continuous nitrogen heater solves the difficulties of thermal expansion of the heating element and high-current electric conduction, and can realize continuous heating of nitrogen currents.

Description

technical field [0001] The invention relates to a high-temperature continuous nitrogen heater, which is mainly used for heating nitrogen and inert gases in wind tunnel experimental research, and belongs to the field of aerospace. Background technique [0002] Conventional hypersonic wind tunnels generally use compressed air or nitrogen as the test medium, and when compressed air or nitrogen expands in the nozzle, the temperature of the airflow drops sharply, causing the airflow to condense. Therefore, in a hypersonic wind tunnel, heating equipment is generally used to heat the test medium to avoid condensation of the airflow. [0003] In the wind tunnel experiment process, there are many airflow heating equipment, mainly including heat storage type and continuous type. The regenerative heater heats the heat storage elements such as metal plates and ceramic bodies, and heats the gas through the heat stored in the heat storage elements. Continuous heaters can use electrical ...

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Problems solved by technology

[0004] The main purpose of the present invention is to solve the problem of high temperature heating of nitrogen and inert gas in the wind tunnel experiment process,

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