Control valves have an important function in the warship power system. In engineering practice, the fluid oscillation inside the control valve causes the additional load to the valve actuator. When the additional load is added to the original load of the valve, it is possible that the required driving force (or driving moment) of the valve is greater than the maximum force (or moment) output by the actuator, which may cause the abnormal stop of the actuator. Conventionally, the interaction effect of the valve mechanical and electric components on the valve chamber’s flow field cannot be considered in computational fluid dynamics (CFD) simulations, so the oscillating fluid loads cannot be accurately obtained. In order to solve this problem, the mechanical-electric-fluid integrated valve model, using the FLUENT and AMESim cosimulation method, was developed to embody the interaction effect between the components of each part of the control valve and exhibit the fluid oscillation during the operating process of the control valve. Compared with the pure software simulations, the unsteady flow characteristics and dynamic response of the actuator were synchronously obtained in this study, which accurately captured the sudden fluid loads required for further compensation. At the same time, the differences in performance of different valve plugs were compared. The stability time of the valve plug and oscillation amplitude of the unstable fluid loads were distinct for control valves with different flow characteristics. The results can aid in understanding the instability mechanism of the fluid load in the control valve better, which provides the calculation basis for compensating the additional load on the valve plug and improve the reliability of the control valve.

中文翻译：

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基于机电液协同仿真模型的舰船控制阀动态仿真

控制阀在军舰动力系统中起着重要的作用。在工程实践中，控制阀内部的流体振荡会给阀执行器带来额外的负载。当附加负载加到阀的原始负载上时，阀的所需驱动力（或驱动力矩）可能会大于执行器输出的最大力（或力矩），这可能会导致异常执行器停止。常规上，在计算流体动力学（CFD）模拟中不能考虑阀机械部件和电气部件对阀腔流场的相互作用影响，因此无法准确获得振荡流体载荷。为了解决这个问题，采用FLUENT和AMESim协同仿真方法的机电液集成阀模型，专门为体现控制阀各部分之间的相互作用而开发的阀芯，并在控制阀的运行过程中表现出流体振荡。与纯软件仿真相比，本研究同步获得了执行器的非稳态流动特性和动态响应，从而准确捕获了需要进一步补偿的突然流体载荷。同时，比较了不同阀芯的性能差异。对于具有不同流量特性的控制阀，阀塞的稳定时间和不稳定流体载荷的振荡幅度是不同的。结果有助于更好地了解控制阀中流体载荷的不稳定性机理，