化工进展2026，Vol.45Issue(2)：685-693,9.DOI:10.16085/j.issn.1000-6613.2025-0151
立式螺旋管内亚临界水-水蒸气两相流截面含气率研究及预测模型建立
Study and establishment of a predictive model for cross-sectional void fraction of subcritical water-steam two-phase flow in vertical helically coiled tubes
摘要
Abstract
The helical tube steam generator,recognized for its compact structure and high heat transfer efficiency,has emerged as a crucial component in the design of fourth-generation nuclear reactors.This study investigated the distribution of cross-sectional void fraction(α)in high-temperature,high-pressure(HTHP)water-steam two-phase flow within helical tubes under subcritical pressure conditions.A γ-ray measurement platform was established,and experiments were conducted across a wide range of operational conditions.The experimental results indicated that the α increased with an increase in thermal equilibrium quality(x).Furthermore,the relationship between α and volume void fraction(β)was determined to be piecewise linear.Based on this,flow patterns within helical tubes were classified into bubble,slug,and annular flow.A new prediction model for the α in water-steam two-phase flow within helical tubes under subcritical pressure conditions was developed,incorporating experimental data and previous literature.The model incorporated flow pattern distinctions and was rigorously validated against experimental data,demonstrating significant improvements in prediction accuracy.Compared to existing prediction models,the new model achieved a 47.5%and 15.6%increase in prediction accuracy for the bubble and slug flow regions,respectively.This model could provide valuable insights for the design of helical tube steam generators in fourth-generation nuclear reactors.关键词
螺旋管/两相流/截面含气率/漂移通量模型/γ射线法Key words
helically coiled tube/two-phase flow/cross-sectional void fraction/drift flux model/γ-ray measurement分类
数理科学引用本文复制引用
杨淇淞,武萧衣,常福城,杨佳琪,娄嘉诚,李志斌,李熙,李会雄..立式螺旋管内亚临界水-水蒸气两相流截面含气率研究及预测模型建立[J].化工进展,2026,45(2):685-693,9.基金项目
国家自然科学基金(U20B2036). （U20B2036）
