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首页> 外文期刊>Arabian Journal for Science and Engineering >Analysis of the Thermal Stability of a Vibrationally Non-Equilibrium Molecular Gas with Fixed Vibrational Energy Flowing in a Circular Tube
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Analysis of the Thermal Stability of a Vibrationally Non-Equilibrium Molecular Gas with Fixed Vibrational Energy Flowing in a Circular Tube

机译：固定振动能量在圆管中流动的非平衡振动分子气体的热稳定性分析

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摘要

The thermal stability of a vibrationally non-equilibrium molecular gas with a fixed vibrational energy flowing in a circular tube with a constant surface temperature was theoretically analyzed. The analysis determined the boundaries for the existence of the vibrationally non-equilibrium gas state. It was shown that the upper bound for the existence of a vibrationally non-equilibrium state of a molecular gas increases linearly with increasing Reynolds number over the investigated range, 0 < Re < 550. It also increases when the length of the tube relative to its radius is decreased, and when the non-dimensional quantity, S =pε_(eq)(T_s)r_0~2/λτ(T_s)T_s is decreased. In this non-dimensional quantity, p is the density of the gas, Ts is the tube surface temperature, r is the gas vibrational relaxation time,ε _(eq) is the gas vibrational energy at Ts, and X is the gas coefficient for heat conduction. To obtain a large storage of excess vibrational energy, low values of S must be used.
机译：从理论上分析了具有固定振动能的振动非平衡分子气体在表面温度恒定的圆管中流动的热稳定性。分析确定了振动非平衡气态存在的边界。结果表明，在研究范围内，随雷诺数的增加（0

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