The Role Of Current-Free Double-Layers In Plasma Propulsion

The Role Of Current-Free Double-Layers In Plasma Propulsion
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无电流双层在等离子体推进中的作用

DOI:
10.2514/6.2008-5005
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发表时间:
2008
期刊:
--
影响因子:
--
通讯作者:
E. Ahedo
E. Ahedo
中科院分区:
--
文献类型:
--
作者:
E. Ahedo

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在具有双温电子居群的等离子体中发现了电流自由双层。提出了这类等离子体在拉瓦尔喷嘴内膨胀的模型。在有限的等离子体参数范围内形成固定的双层。它们可以位于发散喷嘴上,或者喉道上,或者收敛喷嘴上;在最后两种情况下,一个非中性的空间涟漪仍然在它们的下游。在较低的热电子密度下,等离子体推进参数有相对增益;当电子温度较高和喷嘴膨胀比较大时,增益往往较大。推进增益和双层形成都与等离子体的异常热力学性质有关。
Current free double layers are found in plasmas with two-temperature electron populations. A model of the expansion of this type of plasma in a Laval nozzle is presented. Stationary double layers form for a limited range of plasma parameters. They can be located either on the divergent nozzle, or the throat, or the convergent nozzle; in the two last cases, a non-neutral spatial rippling remain downstream of them. Relative gains in plasma propulsion parameters are found for moderately low values of hot electron density; gains tend to be larger when electrons are hotter and for larger nozzle expansion ratios. Both propulsion gains and double layer formation are associated to the anomalous thermodynamic properties of the plasma.
用于电力推进应用的小型螺旋等离子体源的研究
DOI: --
发表时间: 2004
期刊: Proc.of the 47^<th> International Symposium on Space Technology and Science 1
影响因子: --
作者:
Kyoichiro Toki;et al.
通讯作者: et al.