scholarly journals A Numerical Analysis of Rotordynamic Fluid Forces on an Artificial Heart Pump Impeller in Whirling Motion

2008 ◽  
Vol 74 (738) ◽  
pp. 310-316 ◽  
Author(s):  
Takayuki SUZUKI ◽  
Koichi YONEZAWA ◽  
Hironori HORIGUCHI ◽  
Tomonori TSUKIYA ◽  
Yoshiyuki TAENAKA ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Artificial Heart ◽  
Pump Impeller ◽  
Fluid Forces ◽  
Whirling Motion ◽  
Heart Pump

scholarly journals The Rotordynamic Fluid Forces on an Artificial Heart Pump Impeller in Whirling Motion

2007 ◽  
Vol 73 (725) ◽  
pp. 205-212 ◽  
Author(s):  
Takayuki SUZUKI ◽  
Romain PRUNIÈRES ◽  
Hironori HORIGUCHI ◽  
Tomonori TSUKIYA ◽  
Yoshiyuki TAENAKA ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Pump Impeller ◽  
Fluid Forces ◽  
Whirling Motion ◽  
Heart Pump

scholarly journals The Rotordynamic Fluid Forces on a Shaft Support Part of Artificial Heart Pump Impeller in Whirling Motion(Fluids Engineering)

2009 ◽  
Vol 75 (752) ◽  
pp. 770-779
Author(s):  
Takayuki SUZUKI ◽  
Koichi YONEZAWA ◽  
Hironori HORIGUCHI ◽  
Tomonori TSUKIYA ◽  
Yoshiyuki TAENAKA ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Pump Impeller ◽  
Fluid Forces ◽  
Whirling Motion ◽  
Heart Pump

Measurements of Rotordynamic Forces on an Artificial Heart Pump Impeller

2007 ◽  
Vol 129 (11) ◽  
pp. 1422-1427 ◽  
Author(s):  
Takayuki Suzuki ◽  
Romain Prunières ◽  
Hironori Horiguchi ◽  
Tomonori Tsukiya ◽  
Yoshiyuki Taenaka ◽  
...  
Keyword(s):  
Artificial Heart ◽  
Journal Bearing ◽  
Centrifugal Pumps ◽  
Pump Impeller ◽  
Fluid Forces ◽  
Heart Pump ◽  
Wide Range ◽  
Artificial Hearts ◽  
Rotordynamic Forces ◽  
Magnetic Drive

In centrifugal pumps for artificial hearts, a magnetic drive with lightly loaded journal bearing system is often used. In such a system, the rigidity of the bearing is small and the impeller usually rotates over the critical speed. In such cases, the rotordynamic fluid forces play an important role for shaft vibration. In the present study, the characteristics of the rotordynamic fluid forces on the impeller were examined. The rotordynamic fluid forces were measured in the cases with/without the whirling motion. It was found that the rotordynamic forces become destabilizing in a wide range of positive whirl. The effect of leakage flow was also examined.

1301 Measurements of Rotordynamic Forces on Artificial Heart Pump Impeller in Whirling Motion

2006 ◽  
Vol 2006.81 (0) ◽  
pp. _13-1_
Author(s):  
Takayuki SUZUKI ◽  
Romain PRUNIERES ◽  
Hironori HORIGUCHI ◽  
Yoshinobu TSUJIMOTO ◽  
Tomonori TSUKIYA
Keyword(s):  
Artificial Heart ◽  
Pump Impeller ◽  
Whirling Motion ◽  
Heart Pump ◽  
Rotordynamic Forces

scholarly journals A Numerical Analysis of Rotordynamic Fluid Forces on an Artificial Heart Pump Shaft Support Part(Fluids Engineering)

2009 ◽  
Vol 75 (752) ◽  
pp. 780-786
Author(s):  
Takayuki SUZUKI ◽  
Bingwei SONG ◽  
Koichi YONEZAWA ◽  
Yoshinobu TSUJIMOTO ◽  
Tomonori TSUKIYA ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Artificial Heart ◽  
Fluid Forces ◽  
Heart Pump ◽  
Pump Shaft

Numerical Analysis of Blood Flow in the Clearance Regions of a Continuous Flow Artificial Heart Pump

2000 ◽  
Vol 24 (6) ◽  
pp. 492-500 ◽  
Author(s):  
Jay Anderson ◽  
Houston G. Wood ◽  
Paul E. Allaire ◽  
Don B. Olsen
Keyword(s):  
Blood Flow ◽  
Numerical Analysis ◽  
Continuous Flow ◽  
Artificial Heart ◽  
Heart Pump

Numerical Analysis of Unsteady Hydrodynamic Forces on a Diffuser Pump Impeller Due to Rotor-Stator Interaction

2002 ◽  
Author(s):  
M. Zhang ◽  
H. Wang ◽  
H. Tsukamoto
Keyword(s):  
Numerical Analysis ◽  
Pressure Fluctuations ◽  
Vortex Method ◽  
Hydrodynamic Forces ◽  
Local Pressure ◽  
Pump Impeller ◽  
Fluid Forces ◽  
Rotor Stator Interaction ◽  
Pipe Systems

The 2-D vortex method and the commercially available CFD software are applied to calculate unsteady hydrodynamic forces on a diffuser pump impeller and the pressure fluctuations caused by the interaction between the impeller and the diffuser vanes. Calculated pressure and fluid forces on the impeller are compared with measured ones. The numerical analysis yields fairly accurate predictions of the fluid forces and the pressure fluctuations in diffuser passages and the pipe systems. It has been demonstrated that the fluid forces caused by the interaction between the rotor and stator vanes are small when the number of vanes on impeller and diffuser is identical. In this case, however, the local pressure fluctuations are larger in diffuser passages and the pipe systems.

Construction of an Artificial Heart Pump Performance Test System

2006 ◽  
Vol 6 (4) ◽  
pp. 151-158 ◽  
Author(s):  
Yingjie Liu ◽  
Paul Allaire ◽  
Yi Wu ◽  
Houston Wood ◽  
Don Olsen
Keyword(s):  
Artificial Heart ◽  
Performance Test ◽  
Test System ◽  
Pump Performance ◽  
Heart Pump

Lateral Fluid Forces on Whirling Centrifugal Impeller (2nd Report: Experiment in Vaneless Diffuser)

1987 ◽  
Vol 109 (2) ◽  
pp. 100-106 ◽  
Author(s):  
H. Ohashi ◽  
H. Shoji
Keyword(s):  
Orbital Motion ◽  
Operating Conditions ◽  
Centrifugal Impeller ◽  
Test Results ◽  
Vaneless Diffuser ◽  
Fluid Forces ◽  
Damping Effect ◽  
Whirling Motion ◽  
Stiffness Matrices ◽  
Whirl Speed

Fluid forces acting on a rotating centrifugal impeller in whirling motion are studied experimentally. A two-dimensional impeller installed in a parallel walled vaneless diffuser was forced on a circular orbital motion at various positive and negative whirl speeds. The measurements show that the fluid forces exert a damping effect on the rotor at most operating conditions, but excite positive whirl when the impeller operates at a partial discharge and rotates at speeds more than twice the whirl speed. The test results were compared with those calculated by the theory described in the 1st Report. The characteristics of whirling fluid forces are examined from both the measurements and calculations. The measured fluid forces are expressed in terms of mass, damping, and stiffness matrices.

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