摘要
针对如何从空气中高效获得可饮用淡水的问题,对一种基于吸附解吸附方法的微型空气取水装置进行了研究,提出了一种将简化拉瓦尔喷管导流结构应用于微型空气取水装置通风管路进而提高取水效率的方法。利用计算流体力学方法(CFD)对该简化拉瓦尔管导流结构参数与装置内空气流动的效果之间的关系进行了模拟仿真,并分析了喉部直径、喉部截面相对通气管路入口高度等条件对空气流量的影响。研究结果表明:简化拉瓦尔管导流结构的通气管路相比传统直筒式通气管路,其内部热空气保温性能更好,使其管路内空气平均密度更低,热压通风量更大,且由于喉部空气加速效果有利于吸附容腔负压力区域的形成,能够有效提高装置内空气流量约50%;同时可以通过对喉部直径和高度参数的调节使装置工作状态均处于最佳流量范围内,进而提高取水效率。
Aiming at the problem of harvesting water efficiently from air,a micro atmospheric water generator based on hygroscopic material was studied. A Laval nozzle for micro atmospheric water generator was designed to improve efficiency. The relation between Laval nozzle structure and air flow in the generator was investigated by employing a CFD（ Computational Fluid Dynamics） numerical simulation. The mass flow based on different diameter and height of nozzle ＂throat＂was analyzed. The results indicate that utilization of Laval nozzle can keep pipe heat insulation,reducing the internal air density,and form the negative pressure area because of the air acceleration effect. Appropriate Laval nozzle can increase mass flow rate in the generator by 50%. The adjustment of Laval nozzle structure can keep the mass flow in the best range and increase work efficiency.
出处
《机电工程》
CAS
北大核心
2018年第3期241-245,共5页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(51175101)
