Evaluation of Temperature-Dependent Viscous Damping Performance in a Smart Fluidic Vibration Isolation System

This study investigates the thermofluidic and structural behavior of a multi-chamber fluidic vibration damping mechanism designed for aerospace applications. A computational fluid dynamics approach, coupled with structural finite element analysis, is employed to evaluate the interaction between pressure-driven flows and material deformation. Four working fluids—Air, Argon, Carbon Dioxide, and Helium—were individually analyzed under a uniform inlet gauge pressure of 200 MPa. The results indicated peak flow velocities exceeding 560 m.s-1, localized pressure maxima of 1.01 MPa, and turbulence kinetic energy values surpassing 197,000 m².s-², reflecting high internal mixing and energy dissipation. Thermal analysis under convective boundary conditions (15 W.m-2·K-1, 280 K ambient) yielded a maximum fluid temperature of 299.7 K. Subsequent structural analyses mapped computational fluid dynamics-derived pressure loads onto three engineering materials: AL 6061-T6, Titanium Ti-6Al-4V, and AISI 316L stainless steel. Although stress levels remained comparable (~36–38 MPa), maximum deformation varied significantly: 0.0102 mm for AL 6061-T6, 0.0065 mm for Ti-6Al-4V, and 0.0043 mm for 316L steel. These findings underscore the critical role of fluid selection and material choice in vibration isolation performance. The integrated fluid-structure interaction simulation framework provides valuable insights for the design and optimization of advanced damping systems in aerospace and energy applications