Improvements to the characteristics of a centrifugal pump through the addition of a vortex rotor were investigated both experimentally and with computational fluid dynamic (CFD) analysis. The idea behind that improvement is in creating so-called coherent structures of eddies and turbulence in the peripheral area of the vortex rotor mounted at the back side of centrifugal rotor. Research on the energy transformations in the centrifugal vortex pump in this work was carried out using numerical simulations of the flow in the centrifugal and the centrifugal vortex pump. Measurements of relevant parameters that describe the performance of pumps, at their physical models, were gained from experiments. The measurement results were used as experimental validation of numerical simulations. In contrast, flow visualization derived from the numerical simulation was used to interpret measurements. In deriving the experimental procedure, special care was taken with the flow measurements. The reason for this is in the fact that the flow measurements had the biggest influence on the overall measurement uncertainty. However, flow measurements were the most demanding with regards to the experiment design and in taking the measurement readings. This experimental-CFD research made it possible to undertake an assessment of vortex rotor contribution on the head of the centrifugal vortex pump. The influence of the vortex rotor on the efficiency of the centrifugal vortex pump was investigated by comparing it with the efficiency of the centrifugal pump with the same geometry. An analysis of the flow structure was conducted in order to better understand the energy transformations that are the result of the interaction between the flow from the channels of the centrifugal part of the centrifugal vortex rotor and vortices formed at the vortex part of the centrifugal vortex rotor as well as their interactions with the stator. It was shown that this additional energy significantly increases pump head while increasing pump stability. This synergetic work has demonstrated that while vortex rotor gives additional energy to the fluid particles, that did not enter stator due to the energy lack by changing their momentum; at the same time, some of the kinetic energy contained in the vortex rotor induced vortices is also added to those fluid particles.

References

References
1.
Mihajlovič
,
P. O.
,
Jurevič
,
M. I.
,
Borisovič
,
K. P.
,
Isaakovič
,
R. A.
, and
Pavlovič
,
T. I.
,
2001
, “
New Rotary-Vortex Pumps for Crude Oil Production in the Complicated Conditions
,” Proceedings of the 1st International Conference of Technical Sciences, Voronež, Russia, pp.
128
143
.
2.
Isaakovič
,
R. A.
, and
Vasiljevič
,
G. N.
,
2003
, “
High-Head, Economical Modification of Multistage Centrifugal Pump for Oil Production,
” Proceedings of the 2nd International Conference of Technical Sciences, Voronež, Ruissa, pp.
221
230
.
3.
Karakulov
,
S. T.
,
Meljnikov
,
D. J.
,
Pereljmman
,
M. O.
, and
Dengaev
,
A.V.
,
2005
, “
Ways of Increasing Efficiency of Oil Exploitation From Oil Wells
”, Proceedings of the International Conference of Technical Sciences, Voronež, Russia, pp.
268
279
.
4.
Melzi
,
E.
,
2008
, “
Vortex Impeller for Centrifugal Fluid-Dynamic Pumps
,” European Patent Application No. EP1 961 965 A2.
5.
Franjić
,
K.
,
1996
,
Measurements in Mechanics of Fluid, Engineering Handbook IP1
,
University Press
,
Zagreb, Croatia
, pp.
1015
1034
.
6.
Goldstein
,
R. J.
,
1996
,
Fluid Mechanics Measurements
,
2nd ed.
,
Taylor & Francis
,
New York
.
7.
Upp
,
E. L.
, and
LaNasa
,
P. J.
,
2002
,
Fluid Flow Measurement a Practical Guide to Accurate Flow Measurement
,
2nd ed.
,
Gulf Professional Publishing
,
Woburn, MA
.
8.
ISO 5167-1:2003, “Measurement of Fluid Flow by Means of Pressure Differential Devices, Part 1: Orifice Plates, Nozzles, and Venturi Tubes Inserted in Circular Cross-Section Conduits Running Full.”
9.
Bean
,
H. S.
, ed.,
1971
,
Fluid Meters Their Theory and Application
,
6th ed.
,
ASME
,
New York
.
10.
EN 837-2:1998, “Pressure Gauges, Part 2: Selection and Installation Recommendations for Pressure Gauges.”
11.
Spalart
,
P. R.
,
2009
, “
Detached-Eddy Simulation
,”
Ann. Rev. Fluid Mech.
,
41
(
1
), pp.
181
202
.10.1146/annurev.fluid.010908.165130
12.
Travin
,
A.
,
Shur
,
M.
,
Strelets
,
M.
, and
Spalart
,
P. R.
,
2002
, “
Physical and Numerical Upgrades in the Detached-Eddy Simulation of Complex Turbulent Flows
,”
Advances in LES of Complex Flows
,
Kluwer Academic Publishers
,
Dordrecht, The Netherlands
, pp.
239
254
.
13.
ANSYS Inc.
,
2009
, “
ANSYS FLUENT 12.0 Theory Guide
,” Ansys, Ann Arbor, MI.
14.
Dochterman
,
R. W.
,
1976
, “
Centrifugal-Vortex Pump
,” General Electric Company, U.S. Patent No. 3,936,240.
15.
Lobanoff
,
V. S.
, and
Ross
,
R. R.
,
1992
,
Centrifugal Pumps—Design & Application
,
2nd ed.
,
Butterworth-Heinemann
,
Houston, TX
.
16.
Mihalić
,
T.
,
Guzović
,
Z.
, and
Sviderek
,
S.
,
2011
, “
Improving Centrifugal Pump by Adding Vortex Rotor
,”
J. Energy Technol.
,
4
(
2
), pp.
11
20
.
17.
Gülich
,
J. F.
,
2008
,
Centrifugal Pumps
,
2nd ed.
,
Springer-Verlag
,
New York
.
18.
Matijašević
,
B.
,
Sviderek
,
S.
, and
Mihalić
,
T.
,
2006
, “
Numerical Investigation of the Flow Instabilities in Centrifugal Fan
,”
Proceedings of the WSEAS Conference on Fluid Mechanics and Aerodynamics
, Agios Nicolaos, Greece, p.
5
.
19.
Perry
,
A. E.
, and
Marusic
,
I.
,
1995
, “
A Wall-Wake Model for the Turbulent Structure of Boundary Layers—Part 1: Extension of the Attached Eddy Hypothesis
,”
J. Fluid Mech.
,
298
, pp.
361
388
.10.1017/S0022112095003351
20.
Kolmogorov
,
A. N.
,
1991
, “
The Local Structure of Turbulence in Incompressible Viscous Fluid for Very Large Reynolds Numbers
,”
Dokl. Akad. Nauk.
,
30
, pp.
301
305
.10.1098/rspa.1991.0075
21.
Jeong
,
J.
, and
Hussain
,
F.
,
1995
, “
On the Identification of a Vortex
,”
J. Fluid Mech.
,
285
, pp.
69
94
.10.1017/S0022112095000462
22.
Villiers
,
E.
,
2006
, “
The Potential of Large Eddy Simulation for the Modeling of Wall Bounded Flows
,” Ph.D. thesis, Imperial College of Science, Technology and Medicine, London, UK.
23.
Rice
,
W.
,
1991
, “
Tesla Turbomachinery
,”
Proceedings of the 4th International Nikola Tesla Symposium
, Belgrade, Serbia, pp.
117
125
.
24.
Taylor
,
G. I.
,
1923
, “
Stability of a Viscous Liquid Contained Between Two Rotating Cylinders
,”
Philos. Trans. R. Soc.
,
223
, pp.
289
343
.10.1098/rsta.1923.0008
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