质子膜内水分和阴极多孔电极中液态水含量是PEM燃料电池正常运行的控制因素.本文给出了一个用于研究PEM燃料电池内水迁移的稳态、等温、两相流模型.模型耦合了连续方程、动量守恒方程和物质守恒方程,以及水在质子膜中传递方程.运用试验结果验证了模型的有效性.分析模拟结果表明,增大系统操作压力、升高电池操作温度和降低加湿温度将会使质子膜中水的净迁移通量增大;增大操作压力、降低操作温度和升高加湿温度会增加阴极CTL与GDL界面上液态水含量.
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