带定位格架棒束通道两相流相界面输运特性
Interfacial structure transport characteristic of two-phase flow in rod bundle channels with a spacer grid
任佳星 1王若好 1王方东 1乔守旭 1韦宏洋 1谭思超 1高璞珍1
作者信息
- 1. 哈尔滨工程大学 黑龙江省核动力装置性能与设备重点实验室,黑龙江 哈尔滨 150001
- 折叠
摘要
为研究棒束通道内空泡份额及相界面浓度等相界面结构参数的分布特性,本文对带原型定位格架的 5×5棒束通道竖直向上空气-水两相流进行实验研究.运用 4 头电导探针对流动方向上不同高度截面处的空泡份额、相界面浓度、气泡速度及平均索特直径等相界面结构参数的局部分布进行了测量.研究表明:相界面参数的径向分布主要由升力、壁面润滑力及湍流扩散力等横向作用力的综合作用决定;定位格架主要通过湍流漩涡聚集和格架剪切破裂影响相界面参数分布特性,二者作用效果相反;定位格架下游存在压降区,在其内部相界面参数分布发生剧烈变化.本文可以为棒束通道两相流相界面输运模型的优化提供参考.
Abstract
To further elucidate the distribution characteristics of interfacial structure parameters such as void frac-tion and interfacial area concentration in rod bundle channels,this study investigates the air-water two-phase flow in the 5×5 rod bundle channels using a prototype spacer grid.The local distribution of phase interface flow parameters such as void fraction,interfacial area concentration,bubble velocity,and Sauter mean diameter were measured u-sing a four-sensor conductivity probe at different height sections in the flow direction.The results reveal that the ra-dial distribution of the phase interface parameters is mainly affected by the combined effect of lateral forces such as lift force,wall lubrication force,and turbulent dispersion force.The spacer grid mainly affects the distribution characteristics of phase interface parameters through turbulent vortex aggregation and grid shear fracture,turbulent vortex enhances bubble coalescence and grid shear enhances bubble breakup.There is a pressure drop zone down-stream of the spacer grid,and the distribution of interfacial parameters inside it undergoes drastic changes.This study provides a reference for optimizing two-phase flow phase interfacial transport models for rod bundle channels.
关键词
棒束通道/定位格架/两相流/电导探针/泡状流/空泡份额/相界面浓度/相态分布Key words
rod bundle channel/spacer grid/two-phase flow/conductivity probe/bubbly flow/void fraction/in-terfacial area concentration/phase distribution引用本文复制引用
基金项目
国家自然科学基金青年基金(11905039)
中核集团"青年英才"项目()
中央高校科研业务费专项资金项目(3072022TS1502)
出版年
2023
国家科技期刊平台
NSTL
维普
万方数据