Reciprocating Engine with Hydrodynamic Bearings
Application ID: 68571
A single cylinder reciprocating engine supported on hydrodynamic bearings is studied. A starting torque is applied to bring the engine to required rpm. The loading torque is switched on once the engine picks up speed. After the start-up, the engine operates on its own driven by the cylinder pressure.
The engine assembly is modeled using the Multibody Dynamics interface in the Multibody Dynamics Module, and the bearing is modeled using the Hydrodynamic Bearing interface in the Rotordynamics Module. A Solid-Bearing Coupling multiphysics coupling is used to combine the two interfaces.
The results include stress in the crankshaft and foundation, pressure in the bearings, engine speed variation, generated power, brake horse power, and orbit of the shaft in the bearing.
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
- COMSOL Multiphysics® und
- Multibody Dynamics Module und
- Rotordynamics Module und
- Structural Mechanics Module
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Spezifikationstabelle and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.