The flow instability of a double-blade centrifugal pump is more serious due to its special design feature with two blades and large passages. dynamic instabilities pressure pulsations can affect the performance operating lifetime. In present study, numerical investigation unsteady time variation within complete was carried out. domain frequency were extracted at 16 monitoring locations covering...

The first roller pump was patented in 1855 by Porter and Bradley and was hand operated. A modification first named "surgical pump", designed and manufactured by E. E. Allen in 1887, was intended for direct blood transfusion. Truax, who also distributed and promoted the Allen pump with one roller, developed the first double roller pump in 1899. In the following decades, several researchers, incl...