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Tubular electric arc ablation device and ablation method

An arc ablation and tubular technology, which is applied in the direction of electric heating devices, electrical components, heating by discharge, etc., can solve the problems that cannot meet the requirements of ablation test, ablation, burn-through and water leakage of the inner shell of the rear electrode, and achieve simple structure, Good economy, easy operation and maintenance

Pending Publication Date: 2021-06-01
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of arc heater has the advantages of being durable, easy to operate and maintain, etc. However, because the arc root generated by the tubular arc heater has serious ablation in a certain area of ​​the rear electrode, under the condition of long-term high-power operation, the inside of the rear electrode The shell is easy to burn through and leak water, which cannot meet the requirements of relevant ablation tests

Method used

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  • Tubular electric arc ablation device and ablation method
  • Tubular electric arc ablation device and ablation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] combine figure 1 with figure 2 As shown, the tubular arc ablation device of this embodiment includes a rear electrode 1, a rear electrode magnetic field coil 2, an air intake chamber 4, a front electrode 5, a nozzle 6 and a control unit, and the front electrode 5 and the rear electrode 1 are respectively arranged on The front end and rear end of the air intake chamber 4, the nozzle 6 is arranged at the front end of the front electrode 5, the rear electrode magnetic field coil 2 is set outside the rear electrode 1, the control unit is connected with the rear electrode magnetic field coil 2, and the control unit can adjust the rear electrode The magnetic field strength of the magnetic field coil 2 is used to change the arc root position at the rear electrode 1 .

[0031] In the tubular arc ablation device of the present embodiment, the air inlet chamber 4 has an air inlet for passing in a working gas (generally air); the front electrode 5 and the rear electrode 1 are bo...

Embodiment 2

[0044] This embodiment is improved on the basis of the tubular arc ablation device in Embodiment 1.

[0045] Specifically, combined with figure 1 with figure 2 As shown, the tubular arc ablation device of this embodiment also includes a front electrode magnetic field coil (not shown), the front electrode magnetic field coil is sleeved outside the front electrode 5, the control unit is connected with the front electrode magnetic field coil, and the control unit can adjust the front electrode magnetic field coil. The magnetic field strength of the electrode magnetic field coil is used to change the arc root position at the front electrode 5 .

[0046] In this embodiment, the setting method of the regulating unit for regulating the magnetic field strength of the front electrode magnetic field coil can be with reference to the regulating method for the rear electrode magnetic field coil 2; at this time, the regulating unit can also include a third resistor and a fourth resistor ...

Embodiment 3

[0049] This embodiment provides an ablation method, which is carried out by using the tubular arc ablation device of Embodiment 1. The ablation method includes the following steps:

[0050] A) Passing working gas into the air inlet chamber 4, and applying current to the tubular arc ablation device at the same time, the arc generated between the rear electrode 1 and the front electrode 5 heats the working gas to form a flow field to ablate the model;

[0051] B) After ablation for a period of time, adjust the magnetic field strength of the rear electrode magnetic field coil 2 through the control unit to change the arc root position at the rear electrode 1 .

[0052] When performing the ablation test, a certain current (usually 500-2000A) is applied to the tubular arc ablation device after the working gas (usually air) is introduced into the air inlet chamber 4, and the arc is generated on the rear electrode 1 and the front electrode. 5 and sprayed out through the nozzle 6 to fo...

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Abstract

The invention provides a tubular electric arc ablation device and an ablation method. The tubular electric arc ablation device comprises an air inlet chamber, a front electrode, a rear electrode, a rear electrode magnetic field coil, a spray pipe and a regulation and control unit. The front electrode and the rear electrode are arranged at the front end and the rear end of the air inlet chamber respectively, the spray pipe is arranged at the front end of the front electrode, the rear electrode magnetic field coil is arranged outside the rear electrode in a sleeving mode, and the regulation and control unit is connected with the rear electrode magnetic field coil. The regulation and control unit can regulate the magnetic field intensity of the rear electrode magnetic field coil so as to change the arc root position of the rear electrode. According to the tubular electric arc ablation device, the ablated area of the rear electrode inner shell can be changed, and long-time ablation of the tubular electric arc ablation device is achieved.

Description

technical field [0001] The invention relates to the technical field of arc heating ablation, in particular to a tubular arc ablation device and an ablation method. Background technique [0002] The arc heater is an experimental device that uses an electric arc to heat the gas to generate an airflow with a temperature of several thousand to tens of thousands of degrees. The performance of materials and thermal protection systems plays an important role in aviation and aerospace. [0003] The tubular arc heater is mainly composed of the front electrode, the rear electrode, the arc chamber cyclone chamber, the magnetic field coil and the nozzle. It uses an arc chamber to separate the two tubular electrodes, and introduces high-pressure rotating air through the arc chamber. The arc is compressed in the center of the tube, and the arc is pulled to both ends of the tube to form an elongated arc whose root rotates around the tube wall. This kind of arc heater has the advantages o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B7/10H05B7/18
CPCH05B7/10H05B7/18H05B7/185
Inventor 焦方坤何大龙杨忠凯
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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