【摘要】 为了解决流固耦合条件下斜盘式轴向柱塞泵的数字化设计问题,采用基于动态边界的流体动力学计算方法(CFD)对其进行了建模与解耦分析。通过UG建立柱塞泵工作过程中流体的三维模型,采用Gambit对模型进行网格划分和局部细化,并设定流体边界为移动边界,利用Fluent软件中用户自定义函数(UDF)方法定义流体可压缩性和黏性,以及边界的运动规律,建立了数字化模型并进行了仿真分析,得到了动态流固耦合状态下泵出口流量变化规律。最后,设计和搭建了柱塞泵出口流量与出口压力测试的试验平台,将测试数据与仿真数据进行了对比,实验结果验证了该建模方法和解析手段的可行性与正确性。更多还原

【Abstract】 In order to solve the problem in digital design of swashplate axial piston pump under the fluid-structure interaction( FSI) conditions,a compute fluid dynamics method( CFD) based on dynamic boundary was used for its modeling and decoupling analysis. UG was used to build the three dimensional( 3-D) model of fluid in piston pump during working process,gambit software was used to mesh the fluid model and to localize in detail,and fluid boundary was set as dynamic boundary. Methods of UDF function in Fluent software were used to define the viscosity and compressibility of fluid,and the rules of motion of boundary. Digital model was established and analyzed with simulation to obtain the rules of variation of the pump outlet flow by the FSI conditions. Finally,an experimental platform was designed and built to measure the outlet flow and outlet pressure of piston pump. By comparing the simulation data and experimental data,the experimental result demonstrates the feasibility and correctness of this method of modeling and analysis.更多还原