基于单向流固耦合高压旋转接头流场分析与结构优化

Flow field analysis and structure optimization of high-pressure rotary joint based on unidirectional fluid-solid coupling

设计了一种可在高压工况下使用的高压旋转接头,并在Ansys中抽取流体域并基于Fluent对其结构进行单向流固耦合仿真。旋转接头入口总流量为150 L/min,出口压力为240 MPa。通过仿真得到了管道内部流场的速度及压力分布情况,并将流体计算结果作为载荷导入固体结构进行静力分析,得到固体结构的形变和等效应力情况。根据仿真结果对旋转接头的结构进行二次优化并再次仿真。通过两次仿真结果的比较,表明流体域内压力随着流体介质流动方向逐渐减小,在流道汇合处出现速度峰值,优化后接头局部应力减小,形变量减小,对高压旋转接头设计优化有一定的参考价值。

In this paper,a high-pressure rotary joint which can be used in high-pressure condition is designed.The fluid domain is extracted from ANSYS and its structure is simulated by the Fluent.The total inlet flow rate of rotary joint is 150 L/min,and the outlet pressure is 240 MPa.The velocity and pressure distribution of the internal flow field of the pipeline are obtained by simulation,and the fluid calculation results are introduced into the solid structure for static analysis,and the deformation and equivalent stress of the solid structure are obtained.According to the simulation results,the structure of the rotary joint is optimized and simulated again.Through the comparison of the two simulation results,it shows that the pressure in the fluid domain gradually decreases with the flow direction of the fluid medium,and the velocity peak appears at the junction of the flow channel.The local stress and deformation of the joint are reduced after optimization,which has a certain reference value for the design and optimization of high-pressure rotary joint.