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2 International Journal of Applied Mechanics and Engineering

2 2012

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Pressure distribution in a porous squeeze film bearing lubricated by a simple Casson fluid

Walicka A., Walicki E., Jurczak P.

International Journal of Applied Mechanics and Engineering

2012

Vol. 17, no. 3

1039-1049

The influence of a wall porosity on the pressure distribution in a curvilinear squeeze film bearing lubricated by a lubricant being a viscoplastic fluid of a simple Casson type is considered. After general considerations on the flow of the viscoplastic fluid (lubricant) in a bearing clearance and in a porous layer the modified Reynolds equation for the curvilinear squeeze film bearing with a Casson lubricant is given. The solution of this equation is obtained by a method of successive approximation. As a result one obtains a formula expressing the pressure distribution. The example of squeeze film in a step bearing (modeled by two parallel disks) is discussed in detail.

Inertia effects in a porous squeeze film bearing lubricated by a Bingham fluid

Walicka A., Walicki E., Jurczak P.

International Journal of Applied Mechanics and Engineering

2012

Vol. 17, no. 3

1027-1038

The influence of inertia and wall porosity on the pressure distribution in a curvilinear squeeze film bearing lubricated by a viscoplastic fluid of a Bingham type is considered. The general consideration on the flow of the viscoplastic fluid in a bearing clearance and in a porous layer are presented. Using the Morgan-Cameron approximation and an averaged inertia method the modified Reynolds equation for the curvilinear thrust bearing is given. The solution of this equation for the case of the squeeze film bearing is presented. As a result one obtains a formula expressing the pressure distribution. The example of a squeeze film between parallel disks is discussed in detail.