针对加氢装置的实际工况,运用ASPEN软件计算空冷器入口多相流的物性参数.运用Fluent软件中的Mixture模型、标准k-ε湍流模型和近壁面低Re模型,对空冷器入口管道、法兰、管箱、管束进行全流场数值模拟,对上、下两排空冷管束的流速和水相分率进行综合分析,实现冲蚀预测.计算结果表明:多相流流经空冷管箱时,会在法兰两侧形成大的漩涡,导致偏流；位于法兰左、右两侧的管束,出口位置水相分率的最大值分别偏向管束底部的左侧和右侧；上排易冲蚀的管束主要集中在正对法兰出口及管箱两侧,下排易冲蚀的管束主要集中在正对法兰出口.数值模拟结果与远场涡流检测、失效管束的解剖结果高度吻合,证明了预测方法的可靠性.%The physical parameters of multiphase flow in the inlet of air cooler were calculated by Aspen software based on the actual operating conditions. The numerical simulation which includes the air cooler inlet pipelines, flanges, head box and bundles was conducted using the Mixture and standard turbulence models in Fluent software. Thus, an erosion prediction was made through analyzing the velocity and aqueous phase fraction of two parallel air cooler tube banks. The results shows that; a deflective flow regime exists because of the large vortexs formed at both sides of flanges when the multiphase flow passes through the header box; The maximum aqueous phase fraction deflected to the bottom left and right of the tube in both sides of flange; The tubes of top row subject to erosion were mainly located on the flanges outlet and two sides of header box, and the tubes of bottom row subject to erosion were located on the flanges outlet. The reliability of forecasting method was validated via the comparison of numerical simulation with the anatomical analysis and RFEC testing.
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