Optimization Design of Pipeline Inside Aviation Hydraulic Integrated Block Based on COMSOL

Aviation hydraulic integrated block is an important part of aircraft hydraulic system, but its large volume, mass weight and internal pipeline pressure loss greatly limit the increase of hydraulic system power density ratio, is one of the components with the greatest weight reduction potential in aircraft hydraulic system. The application of AM technology can greatly improve the design freedom of aviation hydraulic integrated block. Proper design can not only reduce weight and volume, but also improve the internal fluid performance. In this paper, by means of COMSOL, finite element analysis and simulation are carried out on the velocity field and pressure field of circular turning pipe, continuous radius change pipe and B-spline curve pipe. In this paper, the influence of structural parameters of continuous radius change pipe and B-spline curve pipe on pressure loss is investigated in detail. The simulation results show that compared with the traditional machined transition pipe, the circular turning pipe, continuous radius change pipe and B-spline curve pipe can improve the flow performance of the internal fluid, and reasonable structural parameters can further reduce the pressure loss. This result lays a theoretical foundation for the structural optimization design of the internal flow path of the additive manufacturing hydraulic integrated block.