COMPARISON OF ACOUSTIC EMISSION, VIBRATION AND DYNAMIC PRESSURE MEASUREMENTS FOR DETECTING CHANGE IN FLOW CONDITIONS ON A CENTRIFUGAL PUMP

摘要

Measurements from acoustic emission, vibration and dynamic pressure transducers are presented for a range of flows and two pump speeds on a double-suction centrifugal pump. These show that AE signals are more sensitive to change in flow condition away from the pump's best-efficiency point than either vibration or dynamic pressure measurement. Results indicate that AE monitoring may therefore be appropriate for determining the location of best efficiency and for detecting the onset of undesirable hydraulic conditions such as recirculation and cavitation.