EVALUATION OF TEMPERATURE-DEPENDENT VISCOUS DAMPING PERFORMANCE IN A SMART FLUIDIC VIBRATION ISOLATION SYSTEM

Abstract

This study investigates the thermofluidic and structural behavior of a multichamber 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 pressuredriven 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 (~3638 MPa), maximum deformation varied significantly: 0.0102 mm for AL 6061T6, 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.