Abstract:

Optimization design of three basic notches including single-U-shaped, ramp-U-shaped and V-shaped was investigated thoroughly. Fluent, the flow field simulation software, was used to calculate the flow of different notches at different displacements in the constant pressure, and the experiments were done to make sure the reliability of the simulation results  from Fluent by the comparison of simulation results with experimental ones. And it is found that the flow gradient of single-U-shaped notch decreases with its displacement increases, the flow gradient of V-shaped notch basically unchanges with its displacement increases, and the flow gradient of single-U-shaped notch increases with its displacement increases. Using the PSO algorithm and combining some notch simulation calculation results, the optimal sizes of notches were obtained, which could meet the required displacement flow characteristics good effectiveness. And one case that the required displacement flow characteristics verified that the optimization algorithm has high precision, compared with simulation results from optimal sizes.

Key words: notch;optimization design;flow , characteristics;particle swarm optimization(PSO) , algorithm

摘要：

基于Fluent流场仿真分析软件,在定压差条件下,对带有单U形、斜U形以及V形基本节流槽的滑阀阀口开度-流量特性开展了研究,并将其与试验结果进行了对比验证,得出了U形类槽口随着阀口开度的增加流量梯度减小、斜U形类槽口随着阀口开度的增加基本保持不变、V形类槽口随着阀口开度的增加流量梯度增大的结论。基于上述研究,利用粒子群优化算法,得到满足定压差条件下阀口开度-流量特性要求的节流槽优化尺寸,并通过实例验证了优化结果。

关键词: 节流槽, 优化设计, 流量特性, 粒子群算法