In the natural gas industry, sour gas usually contains some impurities such as CO. The influence of CO fraction on temperature separation within the vortex tube is not fully understood. In the present work, a simulation study has been conducted to investigate the flow and heat transfer behavior of CH–CO binary gas mixtures in a counter flow vortex tube. The model was validated against the experimental data and the predicted temperature separation is found to satisfactorily accord with the experimental values. The mole fraction of CO is varied in the range of 0–1.0. The temperature and velocity distribution characteristics of the gas mixture with various CO mole fractions are obtained. The results show that velocity and temperature separation increase with increase of mole fraction of CH at given inlet flow rate. According to the streamline structure, the area of the backflow region grows as the CH mole fraction increases. But the coefficient of performance tends to decrease with improving CH content.

中文翻译：

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涡流管内CH4-CO2二元气体混合物的温度分离特性


在天然气工业中，酸性气体通常含有一些杂质，例如CO。CO含量对涡流管内温度分离的影响尚不完全清楚。在目前的工作中，进行了一项模拟研究，以研究 CH-CO 二元气体混合物在逆流涡流管中的流动和传热行为。该模型根据实验数据进行了验证，预测的温度分离与实验值令人满意地一致。 CO的摩尔分数在0-1.0的范围内变化。获得了不同CO摩尔分数的气体混合物的温度和速度分布特征。结果表明，在给定的入口流量下，速度和温度分离随着 CH 摩尔分数的增加而增加。根据流线结构，回流区域的面积随着CH摩尔分数的增加而增加。但随着CH含量的提高，性能系数趋于下降。