Abstract: Based on computational fluid dynamics(CFD)， a traditional straight parallel flow channel was equipped with a sloping baffle and a flow weir to improve the uniformity of electrolyte distribution and to investigate the fluid flow behavior for all-vanadium reodx flow battery. The hydrodynamics characteristics of vanadium electrolyte in sectional form multi-channel of serpentine flow channel was discussed. The numerical simulation results showed that the sectional form multi-channel of serpentine flow channel can not only keep the good uniformity of electrolyte distribution，but also be able to reduce flowing resistance and pump consumption. In addition，it can optimize the distribution of electrolyte concentration and improve the battery efficiency by choosing the appropriate flow rate of electrolyte and more uniformity of electrolyte distribution.

Key words: all-vanadium redox flow battery, electrolyte, flow channel structure, CFD, numerical simulation

摘要： 为了提高全钒液流电池双极板流道电解液分布均匀性，考察流体流动行为，本文基于计算流体力学，在传统平直并联流道基础上通过增加倾斜挡板和入口流堰，改进流道结构；同时探究钒电池用电解液在分段式多通道蛇形流道内流体水力学特征。数值模拟结果表明：分段式多通道蛇形流道既可以保持传统蛇形流道流体均匀分配的性能，又能有效降低流阻，减少泵耗；合适的电解液流速及其均匀分布可以优化电解液活性物质浓度分布，提高电解液稳定性，增大钒电池能量效率。

关键词: 全钒液流电池, 电解液, 流道结构, 计算流体力学, 数值模拟