Mechanics & Industry
Volume 20, Number 4, 2019
|Number of page(s)||16|
|Published online||11 July 2019|
Dynamic characteristics of water-lubricated journal bearings
Part 1: Full 3D transient hydrodynamic force models using structured mesh movement algorithm
College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
2 College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
* e-mail: email@example.com
Accepted: 24 January 2019
The increasing ecological awareness and stringent requirements for environmental protection have led to the development of water lubricated journal bearings. For the investigation of water-lubricated journal bearings, a new structured mesh movement algorithm for the CFD model is developed and based on this method, the nonlinear transient hydrodynamic force model is established. Then, with consideration of velocity perturbation, a method to determine dynamic coefficients and linear hydrodynamic forces is promoted. After validation of static equilibrium position and stiffness coefficients, a comparative linear and nonlinear hydrodynamic force analysis of multiple grooves water-lubricated journal bearings (MGWJBs) is conducted. The calculation results indicate that the structured mesh movement algorithm is suitable for the dynamic characteristics investigation of water-lubricated journal bearings. And the comparative study shows that there is a considerable difference between the linear and nonlinear hydrodynamic forces of MGWJBs. Further investigation should be carried to evaluate the dynamic responses of rotor supported by MGWJBs under difference force models.
Key words: Water-lubricated journal bearings / computational fluid dynamics (CFD) / dynamic coefficients / nonlinear hydrodynamic forces
© AFM, EDP Sciences 2019
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