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首页> 外文期刊>Journal of propulsion and power >Determining Vacuum-Arc Thruster Performance Using a Cathode-Spot Model
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Determining Vacuum-Arc Thruster Performance Using a Cathode-Spot Model

机译：使用阴极点模型确定真空电弧推力器性能

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摘要

A simple model of the vacuum-arc cathode-spot and plasma region was developed to predict the performance of vacuum-arc thrusters operating roughly in the arc current range 80-300 A with thrust pulses > 250 /is. The conventional-based cathode-spot model predicts ion current, average ion velocity, and erosion rate to establish thruster performance. Vacuum-arc properties for a range of materials (Al, Ti, Cr, Fe, Ni, Cu, Ag, Pb, Bi) were determined as well as maximum arc spot currents for Ti, Cr, Fe, Ni, and Bi. Model results generally show good agreement with published data and predicted thruster performance is comparable to literature. Most values of ion-to-arc current ratio were within 10% of published experimental data, ion velocities within about 30%, and erosion rates were within roughly 50%, provided macroparticle ejection was low. The crucial role of the ion-to-arc current ratio on thruster performance is assessed.
机译：建立了真空电弧阴极点和等离子体区域的简单模型，以预测在推力脉冲> 250 / is的情况下大致在80-300 A电弧电流范围内运行的真空电弧推进器的性能。基于常规的阴极斑点模型可预测离子电流，平均离子速度和腐蚀速率，以建立推进器性能。确定了一系列材料（Al，Ti，Cr，Fe，Ni，Cu，Ag，Pb，Bi）的真空电弧特性，以及Ti，Cr，Fe，Ni和Bi的最大电弧点电流。模型结果通常显示与已公开的数据吻合良好，并且预测的推进器性能与文献相当。如果大颗粒喷射很低，大多数离子-电弧电流比的值在已发表的实验数据的10％以内，离子速度在30％左右，腐蚀速率在50％左右。评估了离子对电弧电流比对推进器性能的关键作用。

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    《Journal of propulsion and power》 |2010年第4期|P.663-672|共10页
  • 作者

    J. Lun; R. T. Dobson; W. H. Steyn;

  • 作者单位

    University of Stellenbosch, Stellenbosch 7602, South Africa Department of Mechanical and Mechatronic Engineering, Western Cape, Private Bag XI, Matieland;

    rnUniversity of Stellenbosch, Stellenbosch 7602, South Africa Department of Mechanical and Mechatronic Engineering, Western Cape, Private Bag XI, Matieland;

    rnUniversity of Stellenbosch, Stellenbosch 7602, South Africa Department of Electrical and Electronic Engineering, Western Cape, Private Bag XI, Matieland;

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