| Publications [#9253] of Thomas P. Witelski
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- Thomas P. Witelski, F. Hendriks, Large Bearing Number Stability Analysis for Tango Class Gas Bearing Sliders,
Tribology Transactions, 42 (3), pp. 668-674 (1999)
[ps]
(last updated on 1999/11/30)
Abstract: Air bearing sliders in the Tango class use load bearing pads
with
inlet-throttled leading edges to control the mass flux and
lift.
The influence of leakage or diffusion effects
is always present in real sliders. In some designs such as
railed taper flat
designs leakage is dominant. The behavior of such sliders
must be determined
with numerical methods that obscure deeper understanding.
Many aspects of the
behavior of Tango class sliders can be understood with the
vast simplification
allowed by inlet throttling. In this paper such a simplified
analysis is
applied to describe a complete air bearing slider composed
of two pads.
The conditions for static level flight are determined, as
well as the linear
stability of heaving and pitching oscillations. Both stable
and unstable
modes are identified. Either damping or amplification can
result from
convective effects in the absence of mechanical damping.
In real implementations of Tango class sliders instability
has
not been observed thanks to diffusion. The present analysis
can serve as
a guide to select initial choices for the operating
parameters that
correspond to maximum convective damping.
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