Şen, SonerŞimşek, Rıza Deniz2023-08-052023-08-052022 AralıŞen, S., Şimşek, R. D., (2022). Investigation of Thermal Behavior and Orifice Flow Characteristics of Aeronautic Hydraulic Servoproportional Valve Spool-Sleeve Structure with Numerical Simulations. International Journal of Aeronautics and Astronautics, 3(3), 120-131. DOI: 10.55212/ijaa.12085202757-6574https://hdl.handle.net/20.500.12395/49170In this study, the mechanical behavior under highest thermal conditions and flow characteristics of the hydraulic fluid of the servo-characterized proportional valve, which is one of the indispensable components of the aviation industry and used for hydraulic flow control, were investigated numerically. In the simulations, 50, 75 and 100 °C were selected as temperatures, and 0.2 mm, 0.6 mm and 1.2 mm spool stroke openings were used for hydrodynamic flow. Simulations were carried out for a pressure difference of 35 bar. As a result of the analysis, it was observed that there was no restriction in the movement of the spool-sleeve structure for a temperature of 75°C, excessive friction occurred in the spool-sleeve structure at 100°C and the movement was restricted. In addition, it can be said that hydraulic turbulences are effective in dispersing polluting particulate matter for all three spool strokes at a pressure difference of 35 bar.en10.55212/ijaa.1208520info:eu-repo/semantics/openAccessHydraulic orificeHydraulic turbulenceJet-flowThermal stressServo-proportional valveArticle33120131