【摘要】 为解决流体力学试验中控制器设计耗时与成本高等问题,提出一种基于计算流体力学(CFD)的控制器设计新方法.该方法利用CFD软件FLUENT模拟被控对象,以用户自定义函数(UDF)完成控制算法,实现了基于CFD的闭环控制,并以冷热水混合器内部温度场的非线性控制系统为例,设计了基于CFD的比例积分(PI)控制器.结果表明,该方法无需进行物理试验即可获得被控系统的控制特性,且利用CFD技术进行控制器设计并不局限于系统某一控制点的研究,可以同时获得系统整场内各点特性,进行分布式的控制器设计.为涉及流体流动、热传导等过程的控制系统提供一种控制器设计的参考思路.更多还原

【Abstract】 A new approach was proposed which embeds a PI controller in computational fluid dynamics(CFD) mode to reduce time consumption and cost in physical fluid experiments.The plants controlled are simulated by commercial CFD software-FLUENT,and control algorithms are incorporated into the CFD model with its User-Defined Functions(UDF).To examine the performance of the new method,an internal temperature field nonlinear control of a hot and cool water mixer was explored for PI controller design.The results show that the system performance could be obtained without implementing physical experiment.Moreover,the character of each point in the entire field could be understood and thus the distributed controller could be designed by this approach.It appears that the present method is feasible in the controller design for systems involving fluid flow and heat transfer.更多还原