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What are the advantagees of air-foil shaped backward-curved centrifugal fan blades?
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If the blades on a forward curved centrifugal evaporator blower become clogged with dirt what will happen?
the suction pressure drop and the evapo freeze
Differences between centrifugal compressors and centrifugal pump?
centrifugal pump uses centrifugal action while reciprocati pump operates on resiprocating motion of pistonA centrifugal pump will typically give you a higher flow rate but a lower pressure, where a piston pump will give you more pressure but a lower flow rate.
How many blades will make a propeller go fastest?
It's the engine that makes the propeller go fast, not the number of blades.
What is the hub of a windmill?
The hub is where the blades connect. From here the blades are turned and the rotational power is transferred (maybe through a drive-shaft and gearbox) to a generator where electricity is generated.
Which type of steam is imparted on the blades of turbine?
Superheated steam.
What is the difference between blade and vane?
A blade is a rotating airfoil, while a vane is a stationary airfoil. A set of blades is referred to as a rotor, while a set of vanes is called a stator. Compressors and turbines are comprised of alternating sets of rotors (blades) and stators (vanes).
Is a prop shaped like a airfoil?
Yes. Propeller blades are much like the wings of an airplane. On a propeller the airfoil chord, twist and camber are change drastically from root to tip - more than on a wing.
If the blades on a forward curved centrifugal evaporator blower become clogged with dirt what will happen?
the suction pressure drop and the evapo freeze
What is the balance drum used for a centrifugal compressor?
In a centrifugal compressor, the energy is transferred using a set of impeller blades and balancing drums. These balancing drums can be on the inlet or outlet side of the compressor and help to space out the energy in the compressor.
What is the difference of an axial flow and centrifugal compressor?
The centrifugal flow compressor has a single or two stage unit using an impeller. The axial flow compressor is a multi-stage unit using alternate rows of rotating (rotor) blades and stationary (stator) vanes.
What is centrifugal blower?
in this, velocity of air increases due to the rotation of blades and pressure also increases by the conversion of kinetic energy of the impellers to pressure head of the wind.
What is the shape of a helicopters wings?
The helicopter main rotor blades have an airfoil shape like an airplanes wing. The entire blade can also be angled by the pilot,through the rotor head. This angle makes it fly or lift.
What is diaphragm used for a centrifugal compressor?
diaphrams are static ones containing guide blades...steam from suction end enters the suction diaphragm and get guided to impeller of centrifugal compressor..ntermediate diaphrams contains diffusers which changes pressure energy..these daphragms forms a part of inner casing.
What are the limitations of the maximum forward speed of a helicopter?
Helicopter blades act in the same way as the wings of an airplane. They generate lift with the air flowing faster on the top of the airfoil then on the bottom. When you reach a certain speed, depending on blade specifications and limits, the air flowing over the blades become equal on the top and bottom of the airfoil. This is what is known as blade stall. The blades no longer generate lift. The same effect in fixed wing aircraft is known as a speed stall. This concept also takes place when a helicopter flies too high. As the air thins with altitude eventually there is not enough air for the blade to "bite". Thus blade stall again.
Static force analysis on over head fan?
Centrifugal force of the fan results in an increase in static force. The blades of the axial flow fans force air to move parallel to them.
How does a propeller produce thrust?
A propeller is like a spinning wing. The airfoil shaped blades pull an airplane forward just as an airplane's wings lift it upward. The amount of thrust created by a propeller depends on how fast and at what angle its blades cut through the air. The propeller is generally powered by a combustion engine which fires pistons and turns the propeller.
How helicopter flies?
First you need to understand lift and how it is generated. If you do a google image search for "airfoil" you can see what it looks like. The top has a curve to it and the bottem is flat. As the airfoil passes through the air, lets say at a speed of 1, the air going over the top of the airfoil must travel at a higher rate of speed, maybe 1.5, that the air giong under the flat bottem. This is known as Bernoulli's Principle or lift. Now, if you take 2 or more long thin airfoils or blades and attach them to a center mast and provide a means for them to tilt and twist you have a basic rotor head of a helicopter. As the blades are spun through the air they create lift, much like if you have your hand out the car window. If you incrase the pitch of the blades by twisting them so the front edge goes up you get more lift and the helicopter goes up. If you tilt the blades to the left, fore example the helicopter will go left. Everything has an equal and opposite reaction. In this case if you turn the rotor blades to the left or counter clockwise the body of the helicopter (fusealage) will want to turn to the right. This is where the tail rotor comes into play. It pushes air to the left to keep the fusealage from turning. If you want to turn the helicopter to the left then you would incrase the pitch of the tail rotor blades to over come the twisting force of the helicopter. To turn to the right you would reduce the pitch of the tail rotor blades and let the helicopter twist agians the main rotor.
