Table of Contents
What is friction loss in motor?
Friction losses are from the motor bearings and lubrication. Windage losses combine losses from the rotor spinning in air that creates drag and those from cooling fans used on the motor, along with friction losses in the bearings. Stray load losses also are present.
What is windage loss in turbine?
In case of part admission turbines that are usually impulse turbines there is churn of steam in expanse having no active steam in steam turbine. As moving rotor blades come in contact by inactive steam then there is move of energy as of blade to steam. This loss of energy as of rotor to fluid is term as ‘windage loss’.
How do you calculate friction and windage losses?
Pout = Pm – Mechanical losses (friction and windage losses). Pout is called the shaft power or useful power.
What is windage loss in transformer?
Windage losses refers to the losses sustained by a machine due to the resistance offered by air to the rotation of the shaft. Windage Losses occurs in electric rotating machines such as motors and generators.
What is friction loss in pipes?
Friction loss is a measure of the amount of energy your piping system loses because your fluids are meeting resistance. As fluid flows through your pipes, it carries energy with it. Unfortunately, whenever there’s resistance to flow rate, it diverts fluids and energy escapes.
What is windage in a steam turbine?
Steam turbines or steam turbine sections, when operated at high speed and little or no steam flow, generate windage due to uncontrolled turbulent flow conditions which can cause high metal temperatures affecting the integrity of steam path components.
What is windage heating?
Windage heating leads to a temperature increase of the steam that flows through the labyrinth. The smaller the radial clearance of the seal, the lower the mass flow through it is, which can result in large temperature increases.
What are the windage losses?
Windage loss is the reduction in efficiency due to windage forces. For example, electric motors are affected by friction between the rotor and air. Large alternators have significant losses due to windage. To reduce losses, hydrogen gas may be used, since it is less dense.
What windage means?
Definition of windage 1a : the space between the projectile of a smoothbore gun and the surface of the bore. b : the difference between the diameter of the bore of a muzzle-loading rifled cannon and that of the projectile cylinder.
What is meant by windage loss?
The loss caused by the air friction between rotor and surrounding air is called windage loss. Windage is the name usually given to air resistance inside rotating electrical machines like generators or motors. Windage losses also occur in machines such as turbines and gearboxes.When the shaft rotates, it displaces air.
What is windage loss in electric rotors?
Windage Losses occurs in electric rotating machines such as motors and generators. Windage losses also occur in machines such as turbines and gearboxes. The windage loss depends on the design and shape of the rotating object.
What is an example of a friction loss?
Examples of friction losses are friction of bearings, bushings or brushes in a universal or brushed type DC motor. In general, the frictional losses are proportional to the rotor speed.
What is the windage loss of a rotating object?
The windage loss depends on the design and shape of the rotating object. For example, in the synchronous machine, salient pole rotors will have more windage loss than non-salient or cylindrical rotors. The windage loss increases with the peripheral speed.