Dynamic Compressors Flashcards
What causes blade fouling?
Dirty gas or the type of gas that compresses
When the flow through a compressor drops what happens to the pressure
Pressure rises causing flow reversal
In a variable speed drive control, stonewalling or (choked) is the point along the compressor curve where………….. Has been reached
max flow has been reached. Pressure increases and flow decreases.
What kind of impeller arrangement doubles the flow capacity of the compressor and reduces discharge pressure.
Double flow arrangement - random mounted (facing the same way)
Three main types of prime movers are.
Electric motors
Steam turbines
Gas turbines
How does air/gas flow through an axial compressor?
Through stages, until discharged in axial direction.
What 2 components may be used in a centrifugal compressor to increase pressure
Diffuser vanes and Volute casings or a combo of the two.
What component is responsible for compressor increase
Stator blades
V⬇️ = P⬆️
What causes axial thrust in a dynamic compressor.
Pressure between the impeller front and back shroud surface.
When maximum flow has been reached in dynamic compressors its referred to as
Stonewall or chocked flow
Occurs as gas velocity reaches the speed of sound.
What is surge?
When low flow causes flow reversal
The velocity turns Into pressure in what section of a of a dynamic compressor
The Volute
