海水淡化旋转式压能回收过程流动自适应性机理研究

项目名称： 海水淡化旋转式压能回收过程流动自适应性机理研究

项目编号： No.51276158

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 能源与动力工程

项目作者： 焦磊

作者单位： 浙江大学

项目金额： 80万元

中文摘要： 压能回收技术是膜法海水淡化三大关键技术之一，它是海水淡化成本的重要决定因素。目前，国内对于压能交换机理及其性能影响因素的研究还比较匮乏，成为制约压能回收技术国有化的瓶颈。压能回收效率和系统稳定性是压能回收技术的重要参考指标。为提高压能回收效率和系统稳定性，重点研究液体掺混区的交互机理，揭示转子内液体掺混区的形成过程和演化机理，提出掺混区可作为"液体活塞"的稳定性条件，探索转子内掺混区形态及其运动规律与时间和流速的变化关系；发展转子在液力作用下的流固耦合研究模型，探索转子旋转角动量与转子液膜阻力的平衡特征；发展转子旋转切入集液槽和切出集液槽时非稳态研究模型，建立瞬态过程流动的数值模拟方法，提出系统的瞬态特性预测方法；建立检测流体系统抗干扰能力的方法，探索掺混、流固耦合及切入切出瞬态受扰动时的变化特征。本项目研究成果可为国内外相关领域研究及工程应用提供必要的理论基础。

中文关键词： 海水淡化；压能回收；旋转式；自适应；数值模拟

英文摘要： Pressure energy recovery technology ，which is one of three key technology in membrane desalination,is the important determinant of Seawater desalination cost. At present, study on the pressure exchange mechanism and its influencing factors is comparely deficient, and become the restriction bottleneck in pressure recovery technology nationalization.Then, the pressure energy recovery efficiency and stability of the system are the important reference index for pressure energy recovery technology.In order to improve the pressure energy recovery efficiency and stability of the system, must explore the effective research plan and reveal adaptive flow mechanism in pressure energy recovery according to the influence factors.By studying the interaction mechanism of liquid mixing, the project reveals the process of liquid mixing and the evolution mechanism, and puts forward the stability conditions of the mixing zone used as "liquid piston". Furthermore, the project explores the change relationship and movement rules of the mixing zone with flow velocity and time.The project also develops fluid-solid coupling model under the action of hydraulic rotor, and explores the balance characteristics between angular momentum and liquid membrane resistance.What's more, developing the liquid unsteady research model when rotor cutt

英文关键词： seawater desalination；pressure recovery；rotary type；self-adaption；numerical simulation