Question

if pressure of atmosphere changes what will be effect on volume flow rate of air at the inlet of compressor ?

Answer 1

The air will flow according to pressure difference that is in high pressure to low pressure direction .

Answer 2

"Decreases in inlet pressure reduces the ability of an air compressors to produce the compressed air. 

And an increase in atmospheric pressure would increase the density of air.

It means that more air mass would enter the compressor per unit time, i.e. a greater mass flow.

Actually the air temperature affects compressor efficiency in three different kinds of system.

"