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Research Papers: Flows in Complex Systems

A Systematical Study of the Influence of Blade Length, Blade Width, and Side Channel Height on the Performance of a Side Channel Pump

[+] Author and Article Information
Annika Fleder

Faculty of Mechanical and Process Engineering,
Institute of Fluid Mechanics
and Fluid Machinery,
Technical University Kaiserslautern,
Gottlieb Daimler Straße,
Kaiserslautern D-67663, Germany
e-mail: annika.fleder@mv.uni-kl.de

Martin Böhle

Professor
Faculty of Mechanical and Process Engineering,
Institute of Fluid Mechanics
and Fluid Machinery,
Technical University Kaiserslautern,
Gottlieb Daimler Straße,
Kaiserslautern D-67663, Germany
e-mail: martin.boehle@mv.uni-kl.de

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received September 3, 2014; final manuscript received June 17, 2015; published online August 4, 2015. Assoc. Editor: Edward M. Bennett.

J. Fluids Eng 137(12), 121102 (Aug 04, 2015) Paper No: FE-14-1488; doi: 10.1115/1.4030897 History: Received September 03, 2014

Two modular side channel pump models have been investigated both numerically and experimentally. For both modular designs, different side channels and impellers could be studied, with the aim to get information about the influence of the different geometries on the performance and the inner flow phenomena of the pump. By understanding the geometry influences, statements about the design process of the pump are possible. Changes of the geometry of the side channel or the impeller affect the flow in both components. This means that the geometrical dimensions must always be related to each other, in order to make statements about influences of the geometry on the characteristics. Thus, various geometrical configurations are setup, their sizes in industrial pumps are indicated and their influence is investigated by simulations. To evaluate the gained numerical data, it is important to understand the influence of mesh and simulation setup on the results. Therefore, a grid study was conducted and additionally the turbulence model was varied. In this paper, two parameters are focused on: these are the side channel height to the blade length (h/l) and the depth of the side channel in relation to the width of the blade (t/w).

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References

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Figures

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Fig. 1

Operating principle of a side channel pump

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Fig. 2

Differences in the pump model A and B

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Fig. 3

Parameters of the pump

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Fig. 4

Impellers with the blade length l40, l30, and l20

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Fig. 5

Pump unit B in acrylic glass

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Fig. 6

Simulation model of the pump unit A with h35_w15_z24

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Fig. 7

Pressure coefficients for different turbulence models

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Fig. 8

Efficiency for different turbulence models

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Fig. 9

Meshing parameters for the impeller

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Fig. 10

Head coefficients for different impeller meshes

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Fig. 11

Efficiency for different impeller meshes

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Fig. 12

Dimensionless pressure coefficient for pump unit A with da = 150

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Fig. 13

Pulsation in BPE for h24, h35, and h40

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Fig. 14

Rise of the head coefficient in maximum pressure point of pulsation at φopt*

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Fig. 15

Exchange mass flow between impeller and side channel in maximum pressure point of pulsation at φopt*

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Fig. 16

Circulation flow between impeller and side channel in maximum pressure point of pulsation at φopt*

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Fig. 17

Flow in the axial gaps for h24, h35, and h40 in maximum point of pulsation at φopt*

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Fig. 18

Dimensionless pressure coefficient for pump unit B with h20_w20_l20, 30, 40

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Fig. 19

Dimensionless pressure coefficient for pump unit B with h40_w20_l20, 30, 40

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Fig. 20

Head coefficient for pump unit B with h/l = 1

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Fig. 21

Dimensionless pressure coefficient for pump unit B with da = 160

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Fig. 22

Influence of the gap size in the experiment on the pressure coefficient

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Fig. 23

Gaps in the side channel pump

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