摘要
旋转入流方式冲刷膜面的膜组件结构是可以调节的,本文应用正交试验设计方法进行试验设计,通过PⅣ试验确定了最佳结构参数。为了考察对膜面的冲刷效果,计算得到流场平面上每一个点的切向速度和径向速度。分析表明,在结构一定时,随着流量的增加,切向速度增大,有效冲刷面积增大,可以更好地破坏温度极化和浓度极化。从试验结果中选择了切向速度均值较大的29~35组,在鸭嘴体入口速度0.303 m/s时,非常直观地分析出第32组是最优结构。结论为膜组件结构的优化和系统效率的提高提供了依据。
This paper obtained the optimal structure parameters of hot-cavity by orthogonal experimental design for the test and the particle image velocimetry(PIV) test.Applying coordinate rotation,the team attained the tangential velocity and radial velocity of a fluid particle.With increase of the flow at the same structure,the tangential velocity and effective scouring area were increased and could better destroy temperature and concentration polarization.The experiment results showed the group of #32 was the optimal structure parameters of hot-cavity at inlet flow velocity=0.303m/s.The paper provided an application proposal for improving the mechanical design and efficiency of membrane distillation system.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2015年第2期318-321,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51266007)
内蒙古自治区自然科学基金资助项目(No.2011MS0711)
关键词
膜蒸馏
热容腔结构
参数优化
membrane distillation system
structure of hot-cavity
optimizing structure parameters
