Experimental investigation on the combusting jet plasmatron and diagnosis of its electron density
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摘要: 以微型固体火箭发动机为模型,根据等离子体物理学和空气动力学,研制出燃烧型喷流等离子体发生器.利用朗缪尔探针阵列研究发生器喷流流场中电子密度轴向和截面的分布;在处理探针测量数据时,采用由带电粒子连续性方程和Poisson方程得到的朗缪尔探针连续流理论模型.实验结果表明:发生器产生的喷流流场为非均匀等离子体流场,流场中存在大量的自由电子和离子,喷流中心的电子密度最大超过4×1012cm-3.喷流等离子体发生器是一种非常有发展前景的飞行器隐身等离子体产生技术.Abstract: A combusting jet plasmatron based on subminiature solid propellant rocket has been developed with plasma physics and aerodynamics for plasma stealth. It was obtained with Langmuir probe and its continu-um theory that the electron density distribution in longitude and cross section of jet field produced by the plas-matron. The result indicates that the jet field is a nonuniform plasma plume where contains plentiful free elec-trons and ions. The maximal electron density in the center of the jet filed is more than 4×1012 cm-3, which satisfies the primary demand on electron density for stealth plasma. The combusting jet plasmatron is a compar-atively promising technique for plasma stealth on aircrafts.
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