This work develops a comprehensive thermohydrodynamic (THD) model for high-speed squeeze film dampers (SFDs) in the presence of lubricant inertia effects. Firstly, the generalized expression for Reynolds equation is developed. Additionally, in order to reduce the complexity of the hydrodynamic equations, an average radial viscosity is defined and integrated into the equations. Subsequently, an inertial correction to the pressure is incorporated by using a first-order perturbation technique to represent the effect of lubricant inertia on the hydrodynamic pressure distribution. Furthermore, a thermal model, including the energy equation, the Laplace heat conduction equations in the surrounding solids (i.e. the journal and the bush), and the thermal boundary conditions at the interfaces is constructed. Moreover, the system of partial differential hydrodynamic and thermal equations is simultaneously solved by using an iterative numerical algorithm. The proposed model is incorporated into a simulation model and the results are represented at different SFD journal speeds and eccentricity ratios. According to the results of the analysis, the fluid film reaction forces are significantly influenced by both the lubricant thermal effects and inertia.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Thermohydrodynamic Modeling of Squeeze Film Dampers in High-Speed Turbomachinery


    Additional title:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Contributors:


    Publication date :

    2018-04-07


    Size :

    17 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Application of Squeeze Film Dampers

    Zeidan, Fouad Y. | Online Contents | 1995


    Pressurized oil squeeze film dampers

    Stiffler,A.K. / Mississippi State Univ.,Dep.of Mech.Engng.,US | Automotive engineering | 1980


    Vibration dampers for cryogenic turbomachinery

    PALAZZOLO, ALAN / OLAN, EMMANUEL / IBRAHIM, AZMAN et al. | AIAA | 1990


    Design of nonlinear squeeze film dampers for aircraft engines

    Gunter, E. / Barret, L. / Allaire, P. | Tema Archive | 1976