Question

Surging is a phenomenon associated with:

• A. Reciprocating pumps
• B. Centrifugal compressors
• C. Gear pumps
• D. Diaphragm pumps

Hint:

Remember: Surging = flow reversal = dynamic compressor issue. It's a classic sign of unstable operation in centrifugal compressors.

Answer 1

The Correct Option is B

Surging is a dynamic instability phenomenon that occurs in centrifugal compressors when the flow through the compressor drops below a certain limit.
At this point, the pressure at the outlet becomes greater than the pressure at the inlet, causing a reverse flow. This reversal of flow can cause severe mechanical vibrations and fluctuations in pressure, which is detrimental to the operation and life of the compressor.
This is a well-known issue in gas turbines, jet engines, and other applications involving dynamic compressors. Reciprocating, gear, and diaphragm pumps do not experience surging in the same way.