化工学报2025，Vol.76Issue(z1)：170-180,11.DOI:10.11949/0438-1157.20241187
大温差两相流动诱导水锤冲击的数值模型
Numerical modelling of water hammer induced by two phase flow with large temperature difference
摘要
Abstract
The injection or return of cold water into a steam line results in the formation of a two-phase flow with a large temperature differential within the piping.This phenomenon gives rise to the condensation of steam and the generation of water hammer,which in turn causes transient peak pressure pulses.Such pulses have the potential to cause damage to the piping.In order to forecast the pressure load of condensation hammer,this paper establishes a six-equation mathematical model of compressible two-fluid flow taking into account the elastic deformation of pipeline cross-section,which is closed by the real physical equation of state,the two-phase flow pattern discrimination formula and the flow heat transfer calculation model library.The model is used to simulate high-temperature steam condensation hammer and to forecast the pressure load by a self-programmed procedure.The PMK-2 test based on condensation water hammer verified the calculation accuracy of the model,and the prediction result of the pressure peak deviated from the test value by 1.7%.Numerical simulations were carried out for two working conditions:cold water injection into steam pipes and non-energetic waste heat discharge.The effect of cold-water flow rate,temperature and pipe diameter on condensation water hammer was investigated using the model in this paper.The findings revealed that an increase in cold water flow rate results in a corresponding rise in peak pressure pulse,while an increase in liquid phase temperature leads to a reduction in peak pressure.Additionally,the study demonstrated that when pipe diameter is sufficiently small,the water hammer phenomenon is no longer observable.关键词
气液两相流/凝结/水锤/传质传热/数值模拟Key words
gas-liquid two-phase flow/condensation/water hammer/mass and heat transfer/numerical simulation分类
数理科学引用本文复制引用
赵子祥,段钟弟,孙浩然,薛鸿祥..大温差两相流动诱导水锤冲击的数值模型[J].化工学报,2025,76(z1):170-180,11.基金项目
国家自然科学基金项目(52371329,52271285) （52371329,52271285）
上海市自然科学基金项目(23ZR1429000,23ZR1478900) （23ZR1429000,23ZR1478900）
上海市青年科技英才扬帆计划(22YF1459700) （22YF1459700）
