Study on flow characteristics and secondary development modeling of the pump-valve in the lubricating oil supply system

To address the intricate flow characteristics and modeling challenges of pressure regulating valves in aero-engine lubrication systems, this work proposes a high-fidelity modeling framework integrating three-dimensional (3D) CFD mechanism analysis with one-dimensional (1D) secondary development. The multi-dimensional effects of operating (rotational speed) and physical parameters (density, viscosity) on flow fields are quantitatively clarified. Results demonstrate that pump rotational speed dominates pressure and flow rate variations, while density and viscosity exert weak positive correlations with system performance. An enhanced 1D model is further developed to capture complex fluid dynamics. Validations confirm it reproduces 3D-simulated physics with errors below 5%, substantially reducing computational costs while preserving accuracy, and holds significant engineering application value.