Phase displacement device and method for enhancing arc root rotation of alternating current arc heater
An AC arc and heater technology, used in measuring devices, testing of machine/structural components, instruments, etc., can solve problems such as hindering the rotation of the arc root, unable to rotate in the same direction of the arc root, etc., to reduce electrode burnout, threshold value Wide range of settings, saving extra power
Pending Publication Date: 2019-03-15
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology
For a DC arc heater, it is easy to make the arc root rotate in the same direction (cyclone direction) through the steady magnetic field of the coil, but the current direction of the arc root of the AC arc is alternating, and the arc root cannot be rotated by using a steady magnetic field. Roots rotate in the same direction
At the same time, the alternating magnetic field generated by the coil generates an induced current on the electrode, and its magnetic field direction is opposite to that of the coil magnetic field, so the internal magnetic field of the electrode is smaller than the coil magnetic field, and there is a phase displacement with the coil magnetic field at the same time, causing an arc within a certain period of time. The direction of the electromagnetic force on the root is opposite to the direction of the cyclone, which hinders the rotation of the arc root
Method used
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Embodiment
[0028] A phase displacement device for strengthening arc root rotation of an AC arc heater, the device includes three sets of cables 3, a mixing chamber 4 and three pole arms 5; each set of cables 3 is double-row;
[0029] One end of the cable 3 is connected to one of the three phases in the AC power system, and the other end is wound on the pole arm 5 and connected to the common ground of the AC power system;
[0030] The pole arm 5 is plugged into the side of the mixing chamber 4;
[0031] The mixing chamber 4 is a hollow cylinder;
[0032] The cable 3 is a high voltage resistant cable;
[0033] The pole arm 5 includes an inner layer and an outer layer, both of which are hollow cylinders, the inner layer is made of red copper, and the outer layer is made of stainless steel, a cavity is formed between the inner layer and the outer layer, and the cavity With a water inlet and a water outlet, flowing water is filled in the cavity;
[0034] The central axes of the three pole ...
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The invention relates to a phase displacement device and method for enhancing arc root rotation of an alternating current arc heater, and belongs to the technical field of enhancement of arc root rotation of the alternating current arc heater. The current direction of the arc root of an alternating current arc is alternating, phase displacement between the arc current and a magnetic field is adjusted in an addition and self-exciting mode, the purposes of prolonging the service life of an electrode and reducing contamination of polluted gas are achieved, and therefore gas purification of a windtunnel flow field is achieved. The device is mainly applied to a three-phase electrode of the alternating current arc heater, alternating current plasma ignition is achieved, and by enhancing arc root rotation, the service life is prolonged, and contaminations are reduced.
Description
technical field [0001] The invention relates to a phase displacement device and method for enhancing the arc root rotation of an AC arc heater, and belongs to the technical field of enhancing the arc root rotation of an AC arc heater. Background technique [0002] The phase displacement device that strengthens the arc root rotation of the AC arc heater is used in the design of the magnetic field coil of the AC arc heater in the aerospace ground test. In order to prolong the service life of the electrode and minimize the pollution of the heated gas, the arc root attached to the inner surface of the electrode must be rotated at a high speed. In addition to the method of using the cyclone, it is also necessary to use the method of an external magnetic field to accelerate the arc root according to the airflow. Direction rotation, the general arc heater is powered by DC, the main advantage is good controllability, by changing the size and direction of the magnetic field, the dire...
Claims
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IPC IPC(8): G01M99/00G01M9/02
CPCG01M9/02G01M99/005
Inventor 林国胜张荣国武建英陈海群
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS