摘要
为了研究射流元件内部的附壁流动机理,利用数值解法推导了射流元件在附壁时流体的各项参数计算公式。随后在给定的已知参数下对射流元件内部附壁流体流动进行了简化计算,利用得出各项参数绘制出图表并且进行了分析,建立了它们之间的相互关系。最后对射流元件附壁动态切换过程进行了模拟,直观地显示了附壁切换的全过程并且得到了活塞的运动曲线以及活塞腔内部压力的变化曲线。研究表明射流元件各出口通道流量与进入喷嘴流量以及它的结构参数有关,增大入口流量可以显著地提升附壁切换频率。
In order to study the wall-attached flow mechanism inside the fluidic element,the formulas for calculating the parameters of the fluid when the fluidic element attaches to the wall were derived by numerical method.Then the wall-attached fluid flow in the fluidic element was calculated under the given condition,the charts were drawn and analyzed by using the obtained parameters,and the relationship between them was established.Finally,the dynamic switching process of the wall-attached of in the fluidic element was simulated.The whole switching process of the wall-attached was visually displayed,and the motion curve of the piston and the change curve of the pressure inside the piston cavity were obtained.The results show that the flow rate of each outlet passage of the fluidic element is related to the flow rate of the inlet nozzle and its structural parameters.Increasing the flow rate of the inlet can significantly increase the switching frequency of the wall-attached.
作者
许福东
董立
谭超
XU Fudong;DONG Li;TAN Chao
出处
《现代机械》
2019年第4期83-87,共5页
Modern Machinery
关键词
射流元件
流场
数值计算
射流式水力振荡器
fluidic element
flow field
numerical calculation
jet hydraulic oscillator
