Cavitation is a phenomenon by which air pockets form in the fluid within a pump, leading to a decrease in pump performance and potential damage to the pump’s internal mechanisms. It can be identified qualitatively by a loud, grinding sound (often compared to “pumping stones”).
Vibration data (as a time series) were recorded for varying operational parameters on 2 x 90kW API end-suction centrifugal pumps on an instrumented commercial pump test facility. The signal recordings were made simultaneously and are phase matched. These data were collected according to methods outlined in Hodkiewicz (ref 1).
In addition to simultaneously sampled 4 ch vibration the data has measures for the net positive suction head margin ratio (NPSH margin ratio) and the cavitation number. NPSH margin ratio is calculated as the ratio of the net positive suction head available to the pump (NPSHA) and the net positive suction head required (NPSHR). As the NPSHR approaches the NPSHA resulting in a small NPSH margin ratio, the severity and likelihood of cavitation increases. It should be noted that both NPSHA and NPSHR vary with the flow rate through the pump which is an important factor in cavitation likelihood and severity. Low cavitation numbers are indicative of a high likelihood of cavitation.
Papers published using this data include:
1. Parameter extraction with reservoir computing: Nonlinear time series analysis and application to industrial maintenance (Chaos) https://aip.scitation.org/doi/full/10.1063/5.0039193
- A vibration cavitation sensitivity parameter based on spectral and statistical methods (Expert Systems and Applications) https://www.sciencedirect.com/science/article/pii/S0957417414004357
Ref 1: Hodkiewicz, M.R. and Norton, M.P., 2002. The effect of change in flow rate on the vibration of double-suction centrifugal pumps. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 216(1), pp.47-58.
Please cite https://prognosticsdl.systemhealthlab.com/ and the date of access if you publish using this data set.
To use this data you have 1) a meta data file (about the pump), 2) a file summary providing a mapping from each set of test conditions to the csv file containing the vibration data, and 3) a 45MB Zip download of the csv files.
