scholarly journals Numerical and Experimental Investigations of Vortex Flows and Vortex Suppression Schemes in the Intake Passage of Pumping System

2014 ◽  
Vol 7 (2) ◽  
pp. 547086 ◽  
Author(s):  
Fan Yang ◽  
Chao Liu
Keyword(s):  
Experimental Investigations ◽  
Vortex Flows ◽  
Pumping System ◽  
Suppression Schemes

THEORETICAL AND EXPERIMENTAL INVESTIGATIONS OF THREE-DIMENSIONAL VISCOUS VORTEX FLOWS

1963 ◽  
Author(s):  
Coleman duP Donaldson ◽  
Roger D. Sullivan ◽  
AND Richard S. Snedeker
Keyword(s):  
Three Dimensional ◽  
Experimental Investigations ◽  
Vortex Flows

Experimental Investigations on a Permanent Magnet Brushless DC Motor Fed by a PV Array for a Water Pumping System

2000 ◽  
Vol 122 (3) ◽  
pp. 129-132 ◽  
Author(s):  
C. L. Putta Swamy ◽  
Bhim Singh ◽  
B. P. Singh ◽  
S. S. Murthy
Keyword(s):  
Permanent Magnet ◽  
Low Cost ◽  
Drive System ◽  
Experimental Investigations ◽  
Brushless Dc ◽  
Pv Array ◽  
Pumping System ◽  
Water Pumping ◽  
Permanent Magnet Brushless Dc ◽  
Motor Drive System

This paper describes the experimental study carried out on a Permanent Magnet Brushless DC (PMBLDC) motor coupled to a pump load powered by a Photo Voltaic (PV) Array for a Water Pumping System. A simple low cost controller has been designed and developed without any current and position sensors. This drastically reduces the over all cost of the drive system. This controller is used to test the dynamic behavior of the PMBLDC motor drive system. The mathematical model of the system is developed with a view to carry out a comparison between experimental and simulated response of the drive system. The necessary computer algorithm is developed to analyze the performance under different conditions of varying solar irradiance for a pump load. The developed state space equations are simulated to obtain the performance characteristics which are also verified by conducting suitable experiments on the developed system. [S0199-6231(00)01002-9]

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

Experimental investigations of the use of cartilage in tympanic membrane reconstruction

2000 ◽  
Vol 21 (3) ◽  
pp. 322-328 ◽  
Author(s):  
T ZAHNERT ◽  
K HUTTENBRINK ◽  
D MURBE ◽  
M BORNITZ
Keyword(s):  
Tympanic Membrane ◽  
Experimental Investigations
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