化工学报2016，Vol.5Issue(5)：1806-1813,8.DOI:10.11949/j.issn.0438-1157.20151614
叶栅通道内湿蒸汽非平衡凝结流动的数值模拟
Numerical simulation of wet steam non-equilibrium condensing flow in cascade passage
摘要
Abstract
Subcooled degree is the direct drive potential of condensing phenomena happening and developing. The nucleation process of cascade passage sharply occurs in a narrow flow section. Water droplets distribution is affected by boundary layers and wakes. Due to the condensing parameters distribution steep and sensitive, high resolution second-order TVD scheme and time-marching technique were adopted in numerical algorithm. Using numerical algorithm, the condensing parameter distributions was calculated and compared with measured data to verify the accuracy of the numerical algorithm. Basic physical phenomena of non-equilibrium condensing flow and the influence of inlet subcooled degree on the homogenous nucleation were examined. Varying pattern of pressure, nucleation rate, droplets number, droplets radius and wetness were investigated. It was found that the inlet subcooled degree had a significant influence on non-equilibrium phase change in transonic condensing flow.关键词
湿蒸汽/叶栅通道/跨音速/两相流/凝结/热力学Key words
wet steam/cascade passage/transonic/two-phase flow/condensation/thermodynamics分类
数理科学引用本文复制引用
韩中合,韩旭,李恒凡..叶栅通道内湿蒸汽非平衡凝结流动的数值模拟[J].化工学报,2016,5(5):1806-1813,8.基金项目
国家自然科学基金项目(51576066) （51576066）
中央高校基本科研业务费专项资金项目(2015MS107).supported by the National Natural Science Foundation of China (51576066) and the Fundamental Research Funds for the Central Universities (2015MS107). （2015MS107）
