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超重力真空的形成是超重力真空海水淡化技术实现的前提条件,而超重力蒸发室的结构和操作参数对超重力真空的形成会产生重要影响。借助CFD软件建立了二维轴对称旋转非稳态两相空穴湍流模型,对超重力真空形成过程及超重力蒸发室主要参数的影响进行了仿真实验。结果表明,溢流堰高度对超重力真空的形成有决定性的影响,最小溢流堰高度可根据结构和操作参数确定;增大超重力蒸发室内径、转速、出口间隙和蒸发腔高度,降低出口压强有利于获得超重力真空并增大其体积。根据模拟结果推荐了各结构和操作参数的实际取值范围,并提出了通过排列组合超重力蒸发室达到产水要求的方案。
The formation of super-gravity vacuum is a precondition for the realization of the super-gravity vacuum seawater desalination technology. The structure and operation parameters of the super-gravity evaporation chamber will have a significant impact on the formation of the super-gravity vacuum. The CFD software was used to establish two-dimensional axisymmetric rotational unsteady two-phase cavity turbulence model. The simulation experiments were carried out to investigate the influence of the formation process of hypergravity vacuum and the main parameters of super-gravity evaporation chamber. The results show that the height of overflow weir has a decisive influence on the formation of hypergravity vacuum. The minimum weir height can be determined according to the structure and operation parameters. The inner diameter of the super-gravity evaporation chamber, the rotating speed, the outlet clearance and the height of the evaporation chamber are increased, Pressure helps to get a super-gravity vacuum and increase its volume. According to the simulation results, the actual value range of each structure and operation parameters is recommended, and the scheme to achieve water production by arranging combined super gravity evaporation chamber is proposed.