Research Article

Pressure Pulsations of the Blade Region in S-Shaped Shaft-Extension Tubular Pumping System

Table 2

Frequency analysis of pressure pulsation of P17~P20.

Flowrate coefficient Spectral parameterP17P18P19P20
F1F2F1F2F1F2F1F2

0.368f/Hz13.5972.5013.5972.5013.5972.5013.5972.50
0.01950.00830.2610.00550.02600.00600.01760.0080
0.460f/Hz72.5066.4666.4672.5072.5012.0872.5012.08
0.00390.00330.00380.00260.00390.00340.00390.0034
0.552f/Hz72.508.5372.508.534.2672.504.2672.50
0.00340.00240.00390.00300.00320.00230.00330.0027