Fluid Friction on Smooth Planes

10.2514/8.485 ◽  
1937 ◽  
Vol 4 (12) ◽  
pp. 504-506
Author(s):  
A. F. ZAHM
Keyword(s):  
Fluid Friction ◽  
Smooth Planes

The Mechanism of Energy Loss in Fluid Friction

1946 ◽  
Vol 111 (1) ◽  
pp. 1043-1080
Author(s):  
Boris A. Bakhmeteff ◽  
William Allan
Keyword(s):  
Energy Loss ◽  
Fluid Friction

COMPARATIVE ANALYSIS OF DIFFERENT ROTARY CONTROL SYSTEMS

2020 ◽  
Vol 6 ◽  
pp. 86-93
Author(s):  
R.K. ZARETSKIY
Keyword(s):  
Comparative Analysis ◽  
Control Systems ◽  
Friction Torque ◽  
Rotor System ◽  
Control Methods ◽  
Fluid Friction ◽  
Q Learning ◽  
Stiffness Coefficients ◽  
Relative Eccentricity ◽  
Bearing Stiffness

This article provides a comparative analysis of various control systems for a rotor system on fluid friction bearings. The control was carried out on the basis of the criterion of the minimum friction moment, the controlled parameter was the bearing stiffness coefficients. The following control methods were compared in terms of friction torque and rotor eccentricity: STATIC, PID, DQN, DDPG, Q-Learning and SARSA. The control systems were guided by the following observed parameters: the values of coordinates and velocities along the x, y axes, as well as the frictional moment and relative eccentricity.

Effect of Lubrication of Fluid Friction Bearings with Media of Complex Rheology

2014 ◽  
Vol 630 ◽  
pp. 199-207 ◽  
Author(s):  
Leonid Savin ◽  
Alexey Kornaev ◽  
Elena Kornaeva
Keyword(s):  
Carrying Capacity ◽  
Computer Experiment ◽  
Friction Torque ◽  
Friction Loss ◽  
Shear Strain Rate ◽  
Fluid Friction ◽  
Lubricating Material ◽  
Two Dimensional Flow ◽  
Complex Rheology ◽  
Friction Bearings

The paper investigates the two-dimensional flow of an incompressible viscous fluid of complex rheology in the gap between two cylinders with respect to fluid friction bearings. The viscosity of the fluid is defined as a physical quantity field, satisfying the criterion of minimum friction loss approximated as a function of shear-strain rate and pressure. The resulting function is used to calculate the carrying capacity and the friction torque in the bearing. Computer experiment resulted in showing the effect of friction loss lowering due to considering complex rheology of lubricating material.

Sign in / Sign up

Export Citation Format

Share Document