An arc heater for thermal environment simulation of hypersonic aircraft

Abstract

The invention relates to an electric arc heater for thermal environment simulation of a hypersonic flight vehicle and a method of moving a magnetic field to control electric arc roots. The electric arc heater comprises a tubular electrode, a magnetic field coil and a moving mechanism, wherein the tubular electrode comprises a negative electrode, a positive electrode and an arc chamber for connecting the negative electrode and the positive electrode to form an insulating interval; tangential air inlet holes are formed in the air chamber and are used for introducing high pressure rotating air; the magnetic field coil comprises a first magnetic field coil and a second magnetic field coil which are respectively arranged outside the negative electrode and the positive electrode in a sleeved mode; and the moving mechanism is used for moving the first magnetic field coil and / or the second magnetic field coil on the axial direction of the tubular electrode. The electric arc heater changes theposition of axial component of lorentz force of a magnetic field by changing the position of the magnetic field coil, so that the electric arc roots are balanced with the aerodynamic axial component at a certain position on the axial direction of the inner wall of the electrode. Thus, the position of the electric arc roots is controlled, and the stability of electric arc operation is improved.

Description

Technical field[0001]The invention relates to the technical field of hypersonic aircraft, in particular to an arc heater for thermal environment simulation of a hypersonic aircraft and a method for controlling the arc root of the arc by a moving magnetic field.Background technique[0002]The arc heater is an important ground facility for the thermal environment simulation test of hypersonic aircraft. The arc heater uses arc discharge to heat the air to form a high temperature and high speed flow field for testing. The accuracy, repeatability and time stability of the operating parameters of the arc heater have a greater impact on the simulation of the test approaching the real flight environment and improving the precision of the test.[0003]At present, arc heaters have the following defects: large local burnout of electrodes, short service life, low reliability, high failure rate under high-power, long-term operation conditions, and often lead to the failure of the arc heater during t...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing technology cannot meet the needs of a wide range of arc heaters, various test states and working condition parameters for stable operation, and the electrodes have a large local burning loss, short service life and low reliability. Aiming at the defects in the prior art, an arc heater for simulating the thermal environment of a hypersonic vehicle and a method for controlling arc roots by moving a magnetic field are provided

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