The effects of radiative heat transfer in arc-heated nonequilibrium flow simulation
The effects of radiative heat transfer in arc-heated nonequilibrium flow simulation
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DOI：
10.1088/0022-3727/43/18/185201
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发表时间：
2010-04
期刊：
影响因子：
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通讯作者：
Yusuke Takahashi;H. Kihara;K. Abe
中科院分区：
文献类型：
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作者：
Yusuke Takahashi;H. Kihara;K. Abe
对20 kW收缩型电弧加热流动进行了数值模拟，得到了非平衡流场特性的分布。流场用多温度模型的Navier-Stokes方程描述，并与电场和辐射场计算紧密结合。将一种精确、低成本的辐射模型引入到流场模拟中。结果表明，电弧加热装置内的等离子体流动处于高度不平衡状态，电弧放电起着至关重要的作用。通过与不采用辐射模型的计算结果的比较，说明辐射对收缩截面的热传递有显著影响。此外，为了验证本文的数值模型，将数值解与实验数据进行了比较。结果表明，用辐射模型进行的流场模拟与实验数据吻合较好。
Numerical simulation of a 20 kW constrictor-type arc-heated flow was carried out, and the distribution of the nonequilibrium flow-field properties was obtained. The flow field was described by the Navier–Stokes equations with a multi-temperature model, tightly coupled with the electric-field and radiation-field calculations. As a radiation model, an accurate and low-cost model was introduced into the flow-field simulation. It was confirmed that the plasma flow inside the arc-heated facility is in a state of high nonequilibrium and the arc discharge plays a critical role. By comparing the computational results with/without the radiation model, it was clarified that the radiation exerts significant effects on the heat transport in the constrictor section. Additionally, to validate the present numerical model, the numerical solutions were compared with the experimental data. It was indicated that the present flow-field simulation with a radiation model tends to be in good agreement with the corresponding experimental data.