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What is surging in centrifugal compressor. how its happened
and how to avoid it.?
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Answer Posted / ahmed
Dirty intercoolers—Increased air temperature reduces air
density into the compression stage, resulting in reduced
stage pressure ratio and reduced rise to surge.
Dirty inlet filter—Reduces the pressure into the first
stage, resulting in a lower natural surge point. A lower
natural surge point reduces the throttle range.
Hot coolant—Increased air temperature reduces air density
into the compression stage, resulting in reduced stage
pressure ratio and reduced rise to surge.
Hot inlet air—Increased air temperature to the first stage
reduces air density into that stage, resulting in reduced
stage pressure ratio. Since pressure is multiplied as air
moves through a multistage compressor, the first stage has
the most dramatic effect on rise to surge.
Driver input speed—Ability for a centrifugal compressor
stage to make pressure decreases as the square of the stage
speed. A reduction in driver input speed dramatically
affects the total machine pressure ratio and the rise to surge.
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