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

Figure 9

The pulsation spectrums of P01~P08 at impeller inlet under different operating conditions.

(a) Small flowrate condition (𝐾_𝑄=0.368)

(b) High efficiency condition (𝐾_𝑄=0.460)

(c) Large flowrate condition (𝐾_𝑄=0.552)

(d) Small flowrate condition (𝐾_𝑄=0.368)

(e) High efficiency condition (𝐾_𝑄=0.460)

(f) Large flowrate condition (𝐾_𝑄=0.552)