Flow velocity measurement system based on gliding arc

Abstract

The invention relates to a flow velocity measuring system based on a gliding arc. The system comprises a gliding arc electrode, a high-voltage direct-current power supply, a high-frequency oscilloscope and a voltage stabilizing resistor; the gliding arc electrode comprises a cathode probe and an anode probe, the two probes are arranged to form a V-shaped structure; a certain gap is reserved between the two electrodes at the tip of the V-shaped structure; the high-voltage direct-current power supply supplies power to the gliding arc electrode, the probes break down at the position of the minimum distance, generate a gliding arc under the action of airflow; the arc is blown off by the airflow when current is not enough to support the length of the arc, a new arc is formed at the position of the minimum distance of the probes at the same time, and the above situations are repeated. The arc gliding velocity, namely the fluid flow velocity, is calculated by measuring the cycle period from gliding arc generation to fracture and the gliding distance. The relates is simple in structure, low in cost and wide in application range, and can measure the center and near-wall speed of high-speed fluid.

Description

technical field [0001] The invention relates to the fields of aerospace, fluid mechanics and testing, in particular to a flow velocity measurement system based on a slip arc. Background technique [0002] With the continuous development of aerospace technology, ground wind tunnel technology has become a key research method, and to understand complex flow phenomena, it is necessary to measure various data and parameters, which requires the measurement method to be operable under various complex flow field conditions reliability, and the data must have high credibility. [0003] Traditional gas flow rate detection devices mainly include contact measurement and non-contact measurement. In contact measurement, contact measurement technology is a traditional flow velocity measurement method. The measurement probe needs to be in contact with the flow field, so it will interfere with the high-speed flow field and affect the measurement accuracy; at the same time, the harsh detecti...

AI Technical Summary

Problems solved by technology

[0004] In order to realize a gas near-wall flow velocity measurement system with a simple principle and a wide application range, the present invention provides a new device system for measuring velocity by using slip arc, which solves the problems of intrusion measurement difficulty and flow path wall velocity measurement difficulty

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