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首页> 外文期刊>Journal of the Korean Physical Society >Effects of Operating Condition on the 2-dimensional Temperature and Velocity Distributions of a Thermal Plasma Jet in a Segmented Arc Heater
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Effects of Operating Condition on the 2-dimensional Temperature and Velocity Distributions of a Thermal Plasma Jet in a Segmented Arc Heater

机译：操作条件对分段电弧加热器中热等离子体射流的二维温度分布的影响

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摘要

A segmented arc heater with an input power of 2.5 MW for thermal protection studies of a re-entry vehicle was numerically simulated to determine its appropriate operating conditions. A self-developed magnetohydrodynamics code was used to analyze the 2-dimensional characteristics of the thermal plasma jet in the segmented arc heater. Operating ranges of the air flow rate and the arc current were from 20 to 60 g/s and from 400 to 800 A, respectively. Although the velocity of the thermal plasma jet and the input power were increased by increasing the air flow rate, the plasma enthalpy, which is proportional to the temperature, was decreased at a high air flow rate because of the cooling effect. On the other hand, an increase in the arc current had the positive effect of increasing the plasma temperature. As a result, the target enthalpy of over than 20 MJ/kg was achieved for an air flow rate of 40 g/s and an arc current above 600 A.
机译：数值模拟具有2.5mW的输出功率的分段电弧加热器，用于热保护研究的热保护研究，以确定其适当的操作条件。 自开发的磁力流体动力学代码用于分析分段电弧加热器中的热等离子体射流的二维特性。 空气流速的操作范围和电弧电流分别为20至60g / s，分别为400至800a。 尽管通过增加空气流速来增加热等离子体射流和输入功率，但由于冷却效果，在高空气流速下降低了与温度成比例的等离子体焓。 另一方面，电弧电流的增加具有增加等离子体温度的积极效果。 结果，对于40g / s的空气流速，实现了超过20mJ / kg的目标焓，并且电弧电流高于600a。

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