Steady state solution of finite hydrostatic porous oil journal bearings with tangential velocity slip

1984 ◽  
Vol 17 (6) ◽  
pp. 317-323 ◽  
Author(s):  
A.K. Chattopadhyay ◽  
B.C. Majumdar
Keyword(s):  
Steady State ◽  
Tangential Velocity ◽  
Velocity Slip ◽  
Steady State Solution ◽  
Journal Bearings ◽  
State Solution

Hybrid Porous Gas Journal Bearings: Steady State Solution Incorporating the Effect of Velocity Slip

1984 ◽  
Vol 106 (3) ◽  
pp. 322-328 ◽  
Author(s):  
K. C. Singh ◽  
N. S. Rao ◽  
B. C. Majumdar
Keyword(s):  
Steady State ◽  
Reynolds Equation ◽  
Stokes Equations ◽  
Load Capacity ◽  
Velocity Slip ◽  
Steady State Solution ◽  
Static Characteristic ◽  
Journal Bearings ◽  
Mass Rate ◽  
Modified Reynolds Equation

A theoretical analysis is presented to predict the steady state performance characteristics of externally pressurized rotating gas journal bearings incorporating the effect of velocity slip at the porous interface. The governing equation for flow in the porous media and the modified Reynolds equation derived from the Navier-Stokes equations satisfying the velocity slip boundary condition, are solved simultaneously for film pressure distribution. Due to the nonlinearity of modified Reynolds equation the solution is obtained by perturbation method using finite difference technique. The dimensionless load capacity, attitude angle and mass rate of flow are computed numerically for different operating parameters. The effect of slip on the static characteristic is discussed. Comparison of the results with similar available solution for the no-slip case shows good agreement.

Computer-aided design of hydrodynamic journal bearings considering thermal effects

2005 ◽  
Vol 219 (2) ◽  
pp. 133-139 ◽  
Author(s):  
D. S. Singh ◽  
B. C. Majumdar
Keyword(s):  
Steady State ◽  
Thermal Effects ◽  
Computer Aided Design ◽  
Steady State Solution ◽  
Data Bank ◽  
Journal Bearings ◽  
State Solution ◽  
Empirical Relations ◽  
Computer Aided ◽  
Aided Design

A computer-aided design of hydrodynamic journal bearings is provided considering thermal effects. The Reynolds equation has been solved simultaneously along with the energy equation and heat conduction equations in bush and shaft to obtain the steady-state solution. Using the steady-state solution, a computer-aided design of such bearings is given. In this process, a data bank is generated that consists of load, friction factor and flow rate for different L/D and eccentricity ratios. These data are curve fitted to derive empirical relations for steady-state characteristics. These equations were then used in the design of such bearings. After designing the bearing, stability was checked using a linearized method.

Response of a Submerged Cylindrical Shell to an Axially Propagating Step Wave

1965 ◽  
Vol 32 (4) ◽  
pp. 788-792 ◽  
Author(s):  
M. J. Forrestal ◽  
G. Herrmann
Keyword(s):  
Cylindrical Shell ◽  
Steady State ◽  
Wave Front ◽  
Transverse Shear ◽  
Shell Theory ◽  
Steady State Solution ◽  
State Solution ◽  
Rotatory Inertia ◽  
Shear Deformations ◽  
Axial Coordinate

An infinitely long, circular, cylindrical shell is submerged in an acoustic medium and subjected to a plane, axially propagating step wave. The fluid-shell interaction is approximated by neglecting fluid motions in the axial direction, thereby assuming that cylindrical waves radiate away from the shell independently of the axial coordinate. Rotatory inertia and transverse shear deformations are included in the shell equations of motion, and a steady-state solution is obtained by combining the independent variables, time and the axial coordinate, through a transformation that measures the shell response from the advancing wave front. Results from the steady-state solution for the case of steel shells submerged in water are presented using both the Timoshenko-type shell theory and the bending shell theory. It is shown that previous solutions, which assumed plane waves radiated away from the vibrating shell, overestimated the dumping effect of the fluid, and that the inclusion of transverse shear deformations and rotatory inertia have an effect on the response ahead of the wave front.

scholarly journals Comparison of Solvers Performance for Load Flow Analysis

2019 ◽  
Vol 3 (1) ◽  
pp. 26 ◽  
Author(s):  
Vishnu Sidaarth Suresh
Keyword(s):  
Steady State ◽  
Power System ◽  
Reactive Power ◽  
Flow Analysis ◽  
Steady State Solution ◽  
Load Flow ◽  
State Solution ◽  
Computational Time ◽  
Load Flow Analysis ◽  
Active And Reactive Power

Load flow studies are carried out in order to find a steady state solution of a power system network. It is done to continuously monitor the system and decide upon future expansion of the system. The parameters of the system monitored are voltage magnitude, voltage angle, active and reactive power. This paper presents techniques used in order to obtain such parameters for a standard IEEE – 30 bus and IEEE-57 bus network and makes a comparison into the differences with regard to computational time and effectiveness of each solver

Sign in / Sign up

Export Citation Format

Share Document