Add to ORKGPumping head of semi-open impeller is known to drop rapidly with an increase of tip clearance. This head drop has long been treated as the result of increase of hydraulic loss in an impeller channel due to leakage through tip clearance. The present paper reveals that the head drop is mainly caused by a rapid drop of theoretical head due to recirculation flow existing at the impeller outlet. The PIV measurement and CFD calculation of a very low specific speed impeller flow show that the recirculation flow brings low angular momentum into the impeller channel through tip clearance and decreases both the pumping head and the shaft power
There is a rotating stall region, which is the so-called unstable head curve when water jet is opera...
The internal flow in a centrifugal pump with semi-open impeller is visualized and measured by PTV me...
Contribution is focused on modification of low-specific speed pump impellers with respect to stabili...
Introduction Mixed-flow pumps often show an abrupt decrease in pressure head and positively sloped h...
The authors' theory on the tip-clearance loss of centrifugal impellers is modified to include variat...
According to the theory presented by the authors, the tip clearance loss of an unshrouded centrifuga...
Tip clearance between blade end and shroud is inevitable in pump operation and of great importance o...
To explore the influence of tip clearance on pressure fluctuation in a low specific speed mixed-flow...
The velocity distribution is measured at the exit of two different types of unshrouded centrifugal i...
Propellers, pumps, and turbines are widely applied in marine equipment, water systems, and hydropowe...
In the range of very low specific-speed (ns≦100 [m, m3/min, rpm]), performance of a centrifugal pump...
The multiphase rotodynamic pump is widely used in petroleum and gas exploitation, and blade tip clea...
A new diffuser design is developed for a low specific speed, multistage pump. In this design the dif...
Numerical simulations have been performed to investigate tip clearance ffect on through-flow and per...
International audienceIn classical pumps, there is single positive slope part on the curve of pump p...
There is a rotating stall region, which is the so-called unstable head curve when water jet is opera...
The internal flow in a centrifugal pump with semi-open impeller is visualized and measured by PTV me...
Contribution is focused on modification of low-specific speed pump impellers with respect to stabili...
Introduction Mixed-flow pumps often show an abrupt decrease in pressure head and positively sloped h...
The authors' theory on the tip-clearance loss of centrifugal impellers is modified to include variat...
According to the theory presented by the authors, the tip clearance loss of an unshrouded centrifuga...
Tip clearance between blade end and shroud is inevitable in pump operation and of great importance o...
To explore the influence of tip clearance on pressure fluctuation in a low specific speed mixed-flow...
The velocity distribution is measured at the exit of two different types of unshrouded centrifugal i...
Propellers, pumps, and turbines are widely applied in marine equipment, water systems, and hydropowe...
In the range of very low specific-speed (ns≦100 [m, m3/min, rpm]), performance of a centrifugal pump...
The multiphase rotodynamic pump is widely used in petroleum and gas exploitation, and blade tip clea...
A new diffuser design is developed for a low specific speed, multistage pump. In this design the dif...
Numerical simulations have been performed to investigate tip clearance ffect on through-flow and per...
International audienceIn classical pumps, there is single positive slope part on the curve of pump p...
There is a rotating stall region, which is the so-called unstable head curve when water jet is opera...
The internal flow in a centrifugal pump with semi-open impeller is visualized and measured by PTV me...
Contribution is focused on modification of low-specific speed pump impellers with respect to stabili...