直流电弧等离子体炬的能量特性实验分析

Abstract

Abstract: The energy characteristic data of self-stabilized DC arc plasma torch with air and nitrogen as working gas are obtained by experiment. The influence pattern and function relation between arc current, gas volume and arc voltage are concluded, and the variation characteristics of plasma jet power and specific enthalpy are analyzed. The results show that when the arc current is constant, the arc voltage and power increase with the increase of gas volume, while the specific enthalpy decreases with the increase of gas volume. When the gas volume is constant, the power and specific enthalpy increase with the increase of arc current, and the arc voltage decreases with the increase of arc current. By fitting the volt-ampere characteristic function, U_air=480(I²/G)^-0.08G^0.30 for air and U_N₂=693(I²/G)^-0.09G^0.25 for nitrogen, the volt-ampere characteristic curves of the two will have the same general trend. Under the same arc current and gas volume, the arc voltage, power and specific enthalpy of nitrogen as the working gas are larger than that of air.

Key words: plasma torch, volt-ampere characteristics, power, specific enthalpy, energy characteristics

CLC Number:

TL941

ZHANG Ziwei, ZHOU Dongsheng, LIU Chunyu, LU Jie, LIU Xiajie. Experimental analysis on energy characteristics of DC arc plasma torch[J].RADIATION PROTECTION, 2023, 43(3): 265-270.

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Experimental analysis on energy characteristics of DC arc plasma torch

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