Abstract
Results of measurements carried out on the fabricated experimental modular-type arc heater serve as input data for the designed simplified model of the intensively blasted electric arc burning in argon inside the cylindrical arc heater's anode channel. The axial dependence of the arc temperature and radius is expressed using the exponent, the current density on the cathode tip and the arc temperature at the end of the near-cathode boundary layer. These quantities form the vector of state variables that is sought to minimize the value of the objective function expressing the deviations between measured and computed values. On a typical example, the paper demonstrates the sensitivity of the modelling to individual state variables.
Highlights
Results of measurements carried out on the fabricated experimental modular-type arc heater serve as input data for the designed simplified model of the intensively blasted electric arc burning in argon inside the cylindrical arc heater’s anode channel
In the experimental modular-type arc heater, which has been designed and fabricated at the Department of Electrical Power Engineering of the Faculty of Electrical Engineering and Communication, Brno University of Technology for both educational and research purposes, the electric arc is burning in the cylindrical anode channel with water-cooled walls and is stabilized by intensive flow of argon
The paper focuses on the sensitivity of the objective function to the state variables
Summary
In the experimental modular-type arc heater, which has been designed and fabricated at the Department of Electrical Power Engineering of the Faculty of Electrical Engineering and Communication, Brno University of Technology for both educational and research purposes, the electric arc is burning in the cylindrical anode channel with water-cooled walls and is stabilized by intensive flow of argon (see Fig. 1 of [1]). A simple model of the intensively blasted electric arc inside the anode channel has been designed to describe the behavior of the arc and to reveal mutual relationships between main arc heater’s operational quantities and arc’s properties in a simple and clear form suitable for educational purposes. Measured values together with transport and thermodynamic properties of argon [4,5,6] serve as input data of the mathematical model
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