Abstract

A vertical centrifugal pump with a vaned diffuser is very attractive in the field of long-distance water supply. Excessive pressure fluctuations in the vaneless region due to rotor–stator interaction (RSI) need careful evaluation. In the present investigation, the hydraulic performance and pressure fluctuation characteristics of a vertical centrifugal pump with three different lean modes of the blade trailing edge were quantitatively analyzed by comparison experiments, using the same test rig. Results showed that the pressure fluctuation level was the highest in the vaneless region, closest to the volute tongue, and increased as the flow rate deviated from the design flow rate. The lean mode of the blade trailing edge was found to have a slight influence on hydraulic performance, and the relative deviation of experimental specific speeds with three different lean modes was within 6%. The influence of the lean mode of the blade trailing edge on the pressure fluctuation level was experimentally verified for the first time. In particular, the flow rate-averaged peak-to-peak value of pressure fluctuation with the positive lean mode (PLM) was 62% of the corresponding value with the zero lean mode (ZLM), while no significant improvement was observed for the negative lean mode (NLM). The flow mechanism behind this may be explained as a weakening of the jet-wake flow pattern with PLM.

References

1.
Shi
,
F.
, and
Tsukamoto
,
H.
,
2001
, “
Numerical Study of Pressure Fluctuations Caused by Impeller-Diffuser Interaction in a Diffuser Pump Stage
,”
ASME J. Fluids Eng.
,
123
(
3
), pp.
466
474
.10.1115/1.1385835
2.
Zhu
,
B.
,
Tan
,
L.
,
Wang
,
X.
, and
Ma
,
Z.
,
2018
, “
Investigation on Flow Characteristics of Pump-Turbine Runners With Large Blade Lean
,”
ASME J. Fluids Eng.
,
140
(
3
), p.
031101
.10.1115/1.4037787
3.
Zangeneh
,
M.
,
1994
, “
Inviscid-Viscous Interaction Method for Three-Dimensional Inverse Design of Centrifugal Impellers
,”
ASME J. Turbomach.
,
116
(
2
), pp.
280
290
.10.1115/1.2928362
4.
Goto
,
A.
,
Nohmi
,
M.
,
Sakurai
,
T.
, and
Sogawa
,
Y.
,
2002
, “
Hydrodynamic Design System for Pumps Based on 3-D CAD, CFD, and Inverse Design Method
,”
ASME J. Fluids Eng.
,
124
(
2
), pp.
329
335
.10.1115/1.1471362
5.
Zangeneh
,
M.
,
2007
, “
Advanced Design Software for Pumps
,”
World Pumps
,
2007
(
489
), pp.
28
31
.10.1016/S0262-1762(07)70221-3
6.
Wang
,
C.
,
Wang
,
F.
,
An
,
D.
,
Yao
,
Z.
,
Xiao
,
R.
,
Lu
,
L.
,
He
,
C.
, and
Zou
,
Z.
,
2021
, “
A General Alternate Loading Technique and Its Applications in the Inverse Designs of Centrifugal and Mixed-Flow Pump Impellers
,”
Sci. China Technol. Sci.
,
64
(
4
), pp.
898
918
.10.1007/s11431-020-1687-4
7.
Wang
,
C.
,
Wang
,
F.
,
Zou
,
Z.
,
Xiao
,
R.
, and
Yang
,
W.
,
2019
, “
Effect of Lean Mode of Blade Trailing Edge on Hydraulic Performance for Double-Suction Centrifugal Pump
,”
IOP Conf. Ser. Earth Environ. Sci.
,
240
(
3
), p.
032030
.10.1088/1755-1315/240/3/032030
8.
Zangeneh
,
M.
,
Goto
,
A.
, and
Harada
,
H.
,
1998
, “
On the Design Criteria for Suppression of Secondary Flows in Centrifugal and Mixed Flow Impellers
,”
ASME J. Turbomach.
,
120
(
4
), pp.
723
735
.10.1115/1.2841783
9.
Schleer
,
M.
,
Hong
,
S. S.
,
Zangeneh
,
M.
,
Roduner
,
C.
,
Ribi
,
B.
,
Pløger
,
F.
, and
Abhari
,
R. S.
,
2004
, “
Investigation of an Inversely Designed Centrifugal Compressor Stage—Part II: Experimental Investigations
,”
ASME J. Turbomach.
,
126
(
1
), pp.
82
90
.10.1115/1.1625690
10.
Bonaiuti
,
D.
, and
Zangeneh
,
M.
,
2009
, “
On the Coupling of Inverse Design and Optimization Techniques for the Multiobjective, Multipoint Design of Turbomachinery Blades
,”
ASME J. Turbomach.
,
131
(
2
), p.
021014
.10.1115/1.2950065
11.
Li
,
D.
,
Sun
,
Y.
,
Zuo
,
Z.
,
Liu
,
S.
,
Wang
,
H.
, and
Li
,
Z.
,
2018
, “
Analysis of Pressure Fluctuations in a Prototype Pump-Turbine With Different Numbers of Runner Blades in Turbine Mode
,”
Energies
,
11
(
6
), p.
1474
.10.3390/en11061474
12.
Rodriguez
,
C. G.
,
Egusquiza
,
E.
, and
Santos
,
I. F.
,
2007
, “
Frequencies in the Vibration Induced by the Rotor Stator Interaction in a Centrifugal Pump Turbine
,”
ASME J. Fluids Eng.
,
129
(
11
), pp.
1428
1435
.10.1115/1.2786489
13.
Zuo
,
Z.
,
Liu
,
S.
,
Sun
,
Y.
, and
Wu
,
Y.
,
2015
, “
Pressure Fluctuations in the Vaneless Space of High-Head Pump-Turbines—A Review
,”
Renewable Sustainable Energy Rev.
,
41
(
1
), pp.
965
974
.10.1016/j.rser.2014.09.011
14.
Ma
,
Z.
, and
Zhu
,
B.
,
2020
, “
Pressure Fluctuations in Vaneless Space of Pump-Turbines With Large Blade Lean Runners in the S-Shaped Region
,”
Renewable Energy
,
153
(
2020
), pp.
1283
1295
.10.1016/j.renene.2020.02.097
15.
Yao
,
Z. F.
,
Wang
,
F. J.
,
Qu
,
L. X.
,
Xiao
,
R. F.
,
He
,
C. L.
, and
Wang
,
M.
,
2011
, “
Experimental Investigation of Time-Frequency Characteristics of Pressure Fluctuations in a Double-Suction Centrifugal Pump
,”
ASME J. Fluids Eng.
,
133
(
10
), p.
101303
.10.1115/1.4004959
16.
Zeng
,
Y. S.
,
Yao
,
Z. F.
,
Wang
,
F. J.
,
Xiao
,
R. F.
, and
He
,
C. L.
,
2020
, “
Experimental Investigation on Pressure Fluctuation Reduction in a Double Suction Centrifugal Pump: Influence of Impeller Stagger and Blade Geometry
,”
ASME J. Fluids Eng.
,
142
(
4
), p.
041201
.10.1115/1.4045208
17.
Zhao
,
X.
,
Xiao
,
Y.
,
Wang
,
Z.
,
Luo
,
Y.
, and
Cao
,
L.
,
2018
, “
Unsteady Flow and Pressure Pulsation Characteristics Analysis of Rotating Stall in Centrifugal Pumps Under Off-Design Conditions
,”
ASME J. Fluids Eng.
,
140
(
2
), p.
021105
.10.1115/1.4037973
18.
Tao
,
R.
,
Xiao
,
R. F.
,
Zhu
,
D.
, and
Wang
,
F. J.
,
2018
, “
Multi-Objective Optimization of Double Suction Centrifugal Pump
,”
Proc. Inst. Mech. Eng., Part C J. Mech. Eng. Sci.
,
232
(
6
), pp.
1108
1117
.10.1177/0954406217699020
19.
Fu
,
D.
,
Wang
,
F.
,
Zhou
,
P.
,
Xiao
,
R.
, and
Yao
,
Z.
,
2018
, “
Impact of Impeller Stagger Angles on Pressure Fluctuation for a Double-Suction Centrifugal Pump
,”
Chin. J. Mech. Eng.
,
31
(
1
), pp.
1
10
.10.1186/s10033-018-0203-z
20.
Song
,
W.
, and
Cha
,
D.
,
2016
, “
Temporal Kurtosis of Dynamic Pressure Signal as a Quantitative Measure of Combustion Instability
,”
Appl. Therm. Eng.
,
104
(
2016
), pp.
577
586
.10.1016/j.applthermaleng.2016.05.094
21.
Hadjileontiadis
,
L.
,
Douka
,
E.
, and
Trochidis
,
A.
,
2005
, “
Crack Detection in Beams Using Kurtosis
,”
Comput. Struct.
,
83
(
12–13
), pp.
909
919
.10.1016/j.compstruc.2004.11.010
22.
Wang
,
Z.
,
Qian
,
Z.
,
Lu
,
J.
, and
Wu
,
P.
,
2019
, “
Effects of Flow Rate and Rotational Speed on Pressure Fluctuations in a Double-Suction Centrifugal Pump
,”
Energy
,
170
(
2019
), pp.
212
227
.10.1016/j.energy.2018.12.112
23.
Pavesi
,
G.
,
Cavazzini
,
G.
, and
Ardizzon
,
G.
,
2008
, “
Time–Frequency Characterization of the Unsteady Phenomena in a Centrifugal Pump
,”
Int. J. Heat Fluid Flow
,
29
(
5
), pp.
1527
1540
.10.1016/j.ijheatfluidflow.2008.06.008
24.
Pavesi
,
G.
,
Cavazzini
,
G.
, and
Ardizzon
,
G.
,
2008
, “
Time-Frequency Characterization of Rotating Instabilities in a Centrifugal Pump With a Vaned Diffuser
,”
Int. J. Rotating Mach.
,
2008
, pp.
1
10
.10.1155/2008/202179
25.
Tan
,
L.
,
Cao
,
S. L.
,
Wang
,
Y. M.
, and
Zhu
,
B. S.
,
2012
, “
Direct and Inverse Iterative Design Method for Centrifugal Pump Impellers
,”
Proc. Inst. Mech. Eng., Part A J. Power Energy
,
226
(
6
), pp.
764
775
.10.1177/0957650912451411
26.
Deergha Rao
,
K.
, and
Swamy
,
M. N. S.
,
2018
,
Digital Signal Processing Theory and Practice
,
Springer Nature Singapore Pte, Ltd
.,
Singapore
.
27.
Tao
,
R.
,
Xiao
,
R.
,
Wang
,
F.
, and
Liu
,
W.
,
2018
, “
Cavitation Behavior Study in the Pump Mode of a Reversible Pump-Turbine
,”
Renewable Energy
,
125
, pp.
655
667
.10.1016/j.renene.2018.02.114
28.
Brennen
,
C. E.
,
2011
, “
Hydrodynamics of Pumps
,”
Cambridge University Press
,
New York
.
29.
Tan
,
L.
,
Zhu
,
B. S.
,
Cao
,
S. L.
,
Bing
,
H.
, and
Wang
,
Y. M.
,
2014
, “
Influence of Blade Wrap Angle on Centrifugal Pump Performance by Numerical and Experimental Study
,”
Chin. J. Mech. Eng.
,
27
(
1
), pp.
171
177
.10.3901/CJME.2014.01.171
30.
Pei
,
Y.
,
Liu
,
Q.
,
Wang
,
G.
, and
Song
,
W.
,
2020
, “
Collaborative Design of the Wrap Angles Between Impeller and Space Diffuser of Diagonal-Flow Pump
,”
Arabian J. Sci. Eng.
,
45
(
9
), pp.
7835
7849
.10.1007/s13369-020-04725-x
You do not currently have access to this content.