Method for designing high-enthalpy arc heater with fixed arc length

Abstract

The invention relates to a method for designing a high-enthalpy arc heater with fixed arc length, which comprises the following steps that: a compression channel positioned between a positive electrode and a negative electrode of an arc heater is made into a plurality of insertion section (or slice) structures which are insulated from each other; adjacent insertion sections (or slices) are insulated from each other, and tangential rotary gas is aerated between the adjacent insertion sections (or the slices) to compress arc columns and blow over plasmas which are gathered between the sections (or the slices); the thickness of each insertion section (or slice) can be designed according to the need; and when an airflow enthalpy value is higher, the insertion sections (or the slices) have smaller thicknesses, more insertion sections (or the slices) are needed, the pressure gradient distribution of the gas which tangentially enters compression sections from the positions between the insertion sections (or the slices) is also greater, the arc columns can be compressed to be thinner and closer to the axial line, the heat exchange between the electric arc and the gas is also more sufficient, and the airflow specific enthalpy is also higher. The invention can provide the basic design method for the high-enthalpy arc heater with the fixed arc length, and can ensure that an enthalpy value of the arc heater is improved to more level.

Description

technical field [0001] The invention relates to an electric arc heater, in particular to a design method of a high-enthalpy electric arc heater with a fixed arc length. Background technique [0002] The arc heater is a necessary equipment for the high temperature wind tunnel. Its main function is to heat the airflow in the wind tunnel, which is used to simulate the real flight aerodynamic environment of the hypersonic aircraft, to investigate the aerodynamic and aerodynamic conditions of each part of the aircraft, and to provide the design and materials for the aircraft. The development provides reliable test data. Compared with the traditional combustion high-temperature generator, the arc heater has the advantages of wide temperature range, less air pollution, relatively low test cost, and convenient test. As a plasma arc equipment, arc heaters are also widely used in industrial production, such as plasma spraying, plasma smelting, plasma cutting, plasma boiler ignition, p...

AI Technical Summary

Problems solved by technology

However, the structure of the laminated arc heater is complicated, and the maintenance is inconvenient, which brings a lot of trouble to the user.

Although the lamination heater technology in Europe and the United States is relatively mature, due to trade barriers and technical protection, there is currently no mature lamination arc heater design technology in China.

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