化工学报2026，Vol.77Issue(7)：3797-3806,10.DOI:10.11949/0438-1157.20251330
基于面向方程闪蒸模型的管道单元模拟
Pipeline segment simulation based on equation-oriented flash model
摘要
Abstract
Pipeline systems are vital in chemical and energy industries,where accurate steady-state simulation is crucial for design.This work presents an equation-oriented(EO)approach mass,momentum,and energy equations are discretized using the finite volume method,coupled with an improved flash evaporation model based on pseudo-equilibrium temperature and complementary constraints,to construct a fully coupled,differentiable tridiagonal Jacobian matrix,which is then solved using the interior-point method.Validated on three cases—LNG transport,C2/C3 two-phase flow,and superheated steam—the model achieves pressure and temperature drop predictions within 5%relative error of Aspen Plus and PipeSim,with 19%—21%higher computational efficiency than sequential modular methods.The method offers high accuracy,robustness,and speed,enabling reliable real-time simulation and optimization of complex pipeline networks.关键词
数值模拟/两相流/相平衡/面向方程法/有限体积法/EO闪蒸Key words
numerical simulation/two-phase flow/phase equilibrium/equation-oriented approach/finite volume method/EO flash分类
数理科学引用本文复制引用
孙新,王希军,赵军,孙晓岩,陶少辉,项曙光..基于面向方程闪蒸模型的管道单元模拟[J].化工学报,2026,77(7):3797-3806,10.基金项目
山东省重点研发计划项目(2024CXGC010405) （2024CXGC010405）
国家自然科学基金项目(22178190,22408195) （22178190,22408195）
山东省化工过程模拟与优化工业软件重点实验室项目(PKL2024F23) （PKL2024F23）
