前置式超声速旋流分离器设计与凝结特性分析

Numerical Study of Design and Condensation Characteristics of Front-loading Supersonic Separator

针对天然气在长距离管道输送过程中,所含水蒸汽杂质会凝结成液态水的问题,通过运用动力学原理与液滴成核生长理论,开发设计了一种全新的前置式超声速旋流脱水装置。利用CFD中的用户自定义接口建立了含湿天然气的凝结流动模型,数值分析了装置内部的马赫数、过冷度、液滴成核率、液滴半径和湿度等关键凝结参数的变化规律。结果表明:所建立的三维含湿天然气的凝结流动模型可以真实描述超声速旋流分离器中的流动变化规律,为以后装置的工业应用和下一步提高分离效率提供了理论参考。

Aiming at the problem that the water vapor can condense into liquid water in the long distance pipeline, a type of supersonic separation structure was designed according to principle of dynamics and droplet nucleation and growth theory. Based on CFD custom user interface, a spontaneous condensation model was established to simulate the degree of supercoiling, nucleation rate, droplet radius and humidity distribution. The results show that, under the design condition, the reasonable condensation model can reveal the change rule of condensation flow field in the supersonic separation tube, which provides the theoretical reference for industrial application of the device and improvement of the separation sufficiency in the future.