Abstract:
This paper presents a performance analysis of a novel bidirectional
groove design for dry gas seals. The scope of
analysis includes the impact of important groove design
parameters on the dry gas seal performance. The leakage flow
and the axial stiffness and damping force coefficients are taken
into account for performance assessment. For varying geometry
the pressure field in the lubrication gap of the application is
estimated. Based on these pressure fields the performance
parameters are calculated. The utilized method to predict the
fluid flow through the lubrication gap is founded on the
Reynolds theory of lubrication. This two dimensional approach
is based on the assumptions of a laminar viscous flow field with
isothermal conditions and takes aerostatic as well as
aerodynamic effects into account. The 2D approach is solved
by a finite difference approximation. The aim of the
contribution is to recommend geometrical parameters to ensure
large static stiffness and damping force coefficients while still
allowing for low seal leakage rates.
Description:
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
