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首页> 外文期刊>Journal of Thermophysics and Heat Transfer >Spectroscopic Diagnostics of Thermochemical Nonequilibrium Hydrogen Plasma Flow
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Spectroscopic Diagnostics of Thermochemical Nonequilibrium Hydrogen Plasma Flow

机译：热化学非平衡氢等离子体流的光谱诊断

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摘要

A method to diagnose thermochemical nonequilibrium hydrogen plasma flow nonintrusively by emission spectroscopy has been developed. The rotational, vibrational, and electron temperatures have been obtained by the preprocessed line intensity fitting of Fulcher-α band of molecular hydrogen, and the degree of dissociation by the actinometry. In the preprocessed line intensity fitting, the temperatures are guessed on the basis of the similarity of Boltzmann distribution to make the searching domain smaller. As a result, it has become possible to identify the plasma temperatures more easily. Then our method has been applied to the inductively coupled plasma wind tunnel to determine the freestream conditions. The obtained total enthalpy, which is composed of the internal energy, kinetic energy, and chemical energy, shows a reasonable tendency to be almost inversely proportional to the mass flow rate under the condition of fixed input power. The possible error in the temperatures, the degree of dissociation, and the total enthalpy is evaluated in the component-by-component manner.
机译：已经开发了一种通过发射光谱非侵入式诊断热化学非平衡氢等离子体流的方法。旋转，振动和电子温度是通过分子氢的Fulcher-α能带的预处理线强度拟合以及通过光化法测得的解离度获得的。在预处理的线强度拟合中，根据玻耳兹曼分布的相似性来猜测温度，以使搜索范围更小。结果，变得可以更容易地识别等离子体温度。然后我们的方法已经应用于感应耦合等离子体风洞，以确定自由流条件。所获得的总焓由内部能，动能和化学能组成，在输入功率固定的情况下，显示出与质量流率几乎成反比的合理趋势。温度，离解度和总焓的可能误差以逐组分的方式评估。

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