鱼雷发动机三组元比例控制器数值模拟

利用计算流体力学软件Pumplinx模拟鱼雷发动机中三组元比例控制器的内部流场,分析计算中不同压差情况下对比例控制器性能的影响,以及叶片与定子间间隙大小对于比例控制器性能的影响,同时对不同叶片数目下性能进行对比。计算结果表明:由于比例控制器为被动旋转马达结构,其转速和流量均随时间呈周期性脉动变化,随着工作压差增大,转速脉动幅度基本保持不变,而流量和扭矩脉动幅值增加;随着间隙增大,泄漏量增大,但流量、扭矩、转速脉动幅值大幅降低,出口流量较为平稳;叶片数目增多后比例控制器转速降低、排量降低。由计算结果推断出目前比例控制器的最优叶片数目为4。本文可为进一步研究比例控制器精度问题提供参考。

Numerical simulation of tri-proportion controller

The internal flow field of the Tri-proportion controller in the torpedo engine was simulated by the computational fluid dynamics software Pumplinx. Analyzed the influence of different pressure differential in the calculation on the performance of the tri-proportion controller, and the effect of the gap between the blade and the stator on the tri-proportion controller, simultaneously compared the performance under different blade numbers. The calculations prove that: because the Tri-proportion controller is a passive rotating motor structure, Its speed and flow rate are cyclically pulsating over time. As the working pressure difference increases, the speed pulsation amplitude remains basically unchanged, while the flow and torque pulsation amplitude increases. As the gap increases, the leakage increases, but the pulsation of flow, torque and speed are greatly reduced. The outlet flow is relatively stable;the speed and displacement of the proportional controller decrease when the number of blades increases.It is inferred from the calculation results that the optimal number of blades in current tri-proportion controller is four. The study in this article can provide reference for further research on the accuracy of Tri-proportion controller.