流体换向装置流量的建模与仿真分析

基于有限元分析、计算流体力学理论,根据换向装置实际结构建立换向装置三维仿真模型,采用滑移网格技术,所用网格划分方案具有网格数量少、网格质量高等特点,仿真分析换向装置换向过程由于喷嘴内部水流流场变化对换向流量误差的影响。仿真结果显示,换入换出同向型换向装置在满足一定的条件下,换向流量零误差,换向装置换向误差与喷嘴内部特性等因素无关;换入换出反向型换向装置在满足一定条件下,换向流量存在误差,这类换向流量误差和喷嘴内流场特性关联。

Modeling and Simulation Analysis of Flow Rate of Fluid Commutator

Based on the theory of finite element analysis and computational fluid dynamics,a three-dimensional simulation model of the reversing device is established according to the actual structure of the reversing device. With the sliding grid technology,the grid division scheme used has the characteristics of small number of grids and high quality of grids. The simulation and analysis of the reversing flow error of the reversing device due to the change of the flow field inside the nozzle are carried out. The simulation results show that under certain conditions,the commutation flow of the same direction reversing device is zero error,and the commutation error of the reversing device has nothing to do with the internal characteristics of the nozzle and other factors;under certain conditions,the commutation flow of the same direction reversing device is error,which is related to the flow field characteristics of the nozzle.