Computation and measurement of Hall potentials and flow-field perturbations in magnetogasdynamic flow of an axisymmetric free jet
Computation and measurement of Hall potentials and flow-field perturbations in magnetogasdynamic flow of an axisymmetric free jet
复制标题
轴对称自由射流磁气动力流中霍尔电势和流场扰动的计算和测量
DOI：
10.1017/s0022112066000508
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发表时间：
1966
影响因子：
3.7
通讯作者：
D. Otis
中科院分区：
文献类型：
--
作者：
D. Otis
观察了部分电离氩的超声速自由射流和与射流同心的线圈的磁场之间的相互作用。参数的标称值为：马赫数，3;雷诺数，1000;磁雷诺数，0·2;磁相互作用参数，1;霍尔参数，1。射流被强烈地引导。在射流中观察到轴向和径向电场，在相互作用中电势净上升。这些观察结果与基于单一流体、宏观方程和简单段塞流模型的预测一致。对电流方程进行了二阶霍尔参数求解，给出了霍尔势的封闭表达式，与弱场实验结果一致。计算了马赫数为3.11、6.08和10.05时的气流扰动，忽略霍尔流;计算结果与实验定性一致，并表明焦耳加热是高马赫数时扰动气流的主要因素。
The interaction was observed between a supersonic free jet of partially ionized argon and the magnetic field of a coil concentric with the jet. Nominal values of the parameters were: Mach number, 3; Reynolds number, 1000; magnetic Reynolds number, 0·2; magnetic interaction parameter, 1; Hall parameter, 1. The jet was strongly channelled. Axial and radial electric fields were observed in the jet with a net rise in potential across the interaction. These observations were consistent with predictions based on the single fluid, macroscopic equations, and a simple slug flow model. The current equation was solved to second order in the Hall parameter giving a closed form expression for the Hall potential which agreed with the experiments for weak fields. Flow perturbations were calculated for Mach numbers of 3.11, 6.08, and 10.05, neglecting Hall currents; the calculations are in qualitative agreement with the experiments and show Joule heating to be the main factor in perturbing the flow at high Mach numbers.