【摘要】 应用Fluent软件,对多效蒸发器中的一效蒸发器进行仿真模拟,依据设计出的蒸发器的基本结构和工程实际情况,合理简化其物理模型,建立蒸发器全流道双流模型,通过流固耦合分析,掌握蒸发器流场的流速情况和压力特性.仿真结果表明,换热器内部流动压力损失大,流动均匀性不合理,液体阻力表现明显;内部液体流动均匀性和一致性相对较差,外部气流的均匀性和一致性较好.实验验证与仿真模拟结果的误差在允许范围内,说明仿真模拟结果是可靠的.要改善蒸发器内部压力损失过大与流动不均匀问题,需对其内部结构进行合理优化.更多还原

【Abstract】 The one effect evaporator in the multi effect evaporator was simulated using the FLUENT. According to the basic structure of the designed evaporator and the actual situation of the project,the physical model was simplified reasonably and the full flow channel double flow model of the evaporator was established. Through the fluid structure coupling analysis,the flow rate and pressure characteristics of the flow field of the evaporator were mastered. The simulation results showed that the internal flow pressure loss of heat exchanger was large,the flow uniformity was unreasonable,and the liquid resistance performance was obvious; the internal liquid flow uniformity and consistency were relatively poor,and the external air flow uniformity and consistency were good. The error between experimental verification and simulation results was within the allowable range,which showed that the simulation results were reliable. In order to improve the problem of excessive pressure loss and uneven flow in the evaporator,it is necessary to optimize its internal structure reasonably.更多还原