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Abstract:
On the base of the Elrod algorithm, a generalized equation is derived to
describe the lubrication in full film region and in cavitation region of
dynamically loaded journal bearing, which is nominated as the
incompressible mass-conserving cavitation algorithm. A numerical
technique with this algorithm has been solved. By the definition of a
switch function g and a variable x, which have different meaning in
different zone, a generalized equation is derived to integrate the
Reynolds equation in full film region with the lubrication equation in
cavitation region. This algorithm can predict the moving oil boundary
automatically and make the mass conserving boundary condition (JFO
theory) more easily and precisely to be applied in actual analysis. It
is found that the analysis results with the incompressible
mass-conserving cavitation algorithm have good agreement with the
existing experiment data. The incompressible cavitation algorithm can
predict the history moving of cavitation well. And it is also shown that
the pressure value in the cavitation has great effect on the analysis
results.
Key words:
Cavitation Mass conserving boundary condition Journal bearing
CLC No: TH117
国家973计划(G1998020317-4.2)、上海市教委基金(02AK19)和上海市科委基金(03QF14019)资助项目. Received 20050323,
received in revised form 20051103
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