In order to improve the hydraulic performance of multistage centrifugal pumps through utilization auxiliary blades, this paper presents an optimization these blades using orthogonal experiments and grey relational analysis. The scheme for blade structure resulted as follows: Z = 2, R 46.9 mm, W 2.5. vicinity optimal operating point, optimized showed a 6% increase in head compared original schem...

Marine centrifugal pumps are mostly used on board ship, for transferring liquid from one point to another. Based the combination of orthogonal testing and numerical simulation, this paper optimizes structure a drainage trough typical low-specific speed pump, determines priority various geometric factors pump performance, obtains optimal impeller scheme. The influence tank internal flow is also ...

The centrifugal pump is one of the most important pieces energy-consuming equipment in various hydraulic engineering applications. This paper takes a low specific speed as research object. Based on method combining numerical calculation and experimental verification, influence gap drainage structure performance its internal flow field distribution were investigated. inside impeller under differ...

The fluid dynamics of the Thoratec HeartMate III (Thoratec Corp., Pleasanton, CA, U.S.A.) left ventricular assist device are analyzed over a range of physiological operating conditions. The HeartMate III is a centrifugal flow pump with a magnetically suspended rotor. The complete pump was analyzed using computational fluid dynamics (CFD) analysis and experimental particle imaging flow visualiza...

The solid–liquid two-phase centrifugal pump is one of the core power equipment solid phase material hydraulic transportation, widely used in engineering, petrochemical industry, marine metal mineral exploitation, urban sewage treatment, and other sectors national economy. There a significant increase need to transport dense fine particle slurry industrial production. Under this condition, influ...

Noise radiation is of importance for the performance of centrifugal pumps. Aiming at exploring noise radiation patterns of a typical centrifugal pump at different flow rates, a three-dimensional unsteady hydro/aero acoustic model with large eddy simulation (LES) closure is developed. Specifically, the Ffowcs Williams-Hawkings model (FW-H) is employed to predict noise generation by the impeller ...

OBJECTIVE Whether or not selective visceral and renal perfusion during thoracoabdominal aortic aneurysm (TAAA) repair has a protective effect on visceral and renal function remains unknown. The aim of this study was to clarify if selective perfusion has such an effect. METHODS From May 1982 to December 1997, 82 consecutive patients underwent TAAA repair. Patients receiving hypothermic circula...

The purpose of this investigation was to analyze how left ventricular assist device (LVAD) with a centrifugal pump alters left ventricular diastolic hemodynamics and energy by means of a left ventricular pressure volume relationship. Fifteen anesthetized normal pig hearts were studied after placement of an apical drainage LVAD with a centrifugal pump. Indices of the left ventricular isovolumic ...

The energy performance and pressure fluctuations in a centrifugal pump with inlet guide vanes (IGVs) are investigated experimentally and numerically in a prewhirl angle range of −24◦ to 24◦ and in an axial distance range of 280 mm, 380 mm, and 460 mm. The reliability and accuracy of the numerical method are validated by the satisfactory agreement between the experimental data and numerical resu...