What is windage effect?
Windage is a force created on an object by friction when there is relative movement between air and the object. 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.
What is windage loss in machine?
Windage loss in a generator is the power absorbed by the fluid surrounding the rotor. as a result of the relative motion between the rotor and the stator.
What is friction and windage loss?
Friction and windage losses are caused by friction in the bearings of the motor and aerodynamic losses associated with the ventilation fan and other rotating parts. Variable losses consist of resistance losses in the stator and in the rotor and miscellaneous.
What is windage loss in DC generator?
Mechanical Losses in dc machine Mechanical losses are divided into bearing friction loss and windage loss. The losses occurring in the moving parts of the machine and the air present in the machine is known as Windage losses.
What is windage area?
The windage area of a vessel or offshore structure is the area that is exposed directly to the wind. As is obvious, this is the area of all items above the waterline. This will include. Part of the hull/offshore structure above the waterline.
What is the meaning of wind age?
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 the relation between windage torque and speed?
Torque inversely varies with the speed in the windage load torque component. Explanation: Torque varies with a square of speed in the windage load torque component whereas in coulomb torque component torque is constant.
How do you calculate friction and windage loss?
Pout = Pm – Mechanical losses (friction and windage losses).
What is stray losses in motor?
Stray loss refers generally to any induction machine loss not accounted for by the standard calculations of primary copper loss, secondary copper (or slip) loss, core loss measured at no load, or friction and windage.
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 the EMF equation of DC generator?
As the armature rotates, a voltage is generated in its coils. In the case of a generator, the emf of rotation is called the Generated emf or Armature emf and is denoted as Er = Eg. In the case of a motor, the emf of rotation is known as Back emf or Counter emf and represented as Er = Eb.
How do you calculate windage area?
Force of the wind Estimate windage area for a beam wind by multiplying length by freeboard and adding the profile area of the accommodation housing. For a head wind, multiply beam by freeboard and add the area of the bridge front.
What do you mean by windage in an engine?
If we use the Oxford definition, it states that windage is, “the air resistance of a moving object, such as a vessel or a rotating machine part, or the force of the wind on a stationary object.” If we drill down to automotive engines specifically, windage is defined by Canton Racing Products as, “the flow of air within the crankcase.”
What’s the difference between windage and windage loss?
Windage is a force created on an object by friction when there is relative movement between air and the object. 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.
What kind of torque is generated by wind?
The friction torque (TF) is the equivalent value of various friction torques referred to the motor shaft. When a motor runs, the wind generates a torque opposing the motion . This is known as the winding torque.
How does windage affect the efficiency of an object?
Windage is a force created on an object by friction when there is relative movement between air and the object. Windage loss is the reduction in efficiency due to windage forces.