用于马赫探针测量的一维流体探针模型研究
Investigation of a 1-D Fluid Probe Model for Mach Probe Measurements
摘要：
在本文中，我们展示了如何一个二维流体模型可以用来解释从一个倾斜的马赫探针或Gundestrup探针获得的数据。我们使用的微分方程描述的等离子体流和测得的离子饱和电流在探头的表面之间的关系的解决方案的解析近似。通过与方程的精确数值解比较，确定了该解析解的参数。用这种方法，我们能够在整个参数范围内测量平行和垂直的马赫数，最低精度为90%。
英文摘要：
In this paper we show how a two dimensional fluid model can be used to interpret data obtained from an inclined Mach-probe or a Gundestrup probe. We use an analytical approximation of the solution of the differential equations describing the relation between the plasma flow and the measured ion saturation currents at the probe's surface. The parameters of this analytical solution are determined by comparison with the exact numerical solution of the equations. In this way we are able to measure the parallel as well as the perpendicular Mach numbers over the whole parameter range with a minimum accuracy of 90%.
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