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TECHNICAL PAPERS

Fundamental Analysis on Rotor-Stator Interaction in a Diffuser Pump by Vortex Method

[+] Author and Article Information
H. Wang

Department of Mechanical Engineering, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata, Kitakyushu, 804-8550 Japan

H. Tsukamoto

Department of Biological Functions and Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata, Kitakyushu, 804-8550 Japan

J. Fluids Eng 123(4), 737-747 (Jun 29, 2001) (11 pages) doi:10.1115/1.1413242 History: Received January 08, 2001; Revised June 29, 2001
Copyright © 2001 by ASME
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References

Figures

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Schematics of test diffuser pump (a) Test pump; (b) pressure measurement stations for test vaned diffuser
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Mathematical model for calculation
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Panel around solid boundary and nascent vortex elements
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Circulation change in a domain S
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Effect of time step on pressure fluctuations at station(r1,c1) for rated condition
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Effect of panel density on pressure fluctuations at station (r1,c1) for rated condition
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Time histories of instantaneous flow rate and hydraulic head after starting. (a) Case 1(κ=1; rated); (b) Case 2 (κ=0.5; overcapacity); (c) Case 3 (κ=2; low-capacity)
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Time histories of unsteady pressure along c1 line for Case 1 (κ=1; rated); experimental uncertainty in ΔΨ=±7.1%
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Time histories of unsteady pressure at diffuser inlet for Case 1 (κ=1; rated); experimental uncertainty in ΔΨ=±7.1%
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Time histories of pressure fluctuations at station (r1,c1) for Case 1 (κ=1; rated); experimental uncertainty in ΔΨ=±7.1%
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Vortex pattern and relative position of the rotor to stator for Case 1 (rated). (a) At time tA*; (b) at time tB*.
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Time histories of pressure fluctuations for Case 1 (κ=1; rated); Experimental uncertainty in ΔΨ=±7.1%. (a) Station (r1,c3);(b) Station (r2,c3);(c) Station (r3,c3).
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Pressure fluctuations in frequency domain for Case 1 (κ=1; rated). (a) Station (r1,c3); (b) Station (r2,c3); (c) Station (r3,c3).
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(a) Time histories of unsteady pressure on SS of diffuser vane for Case 1 (rated); (b) pressure distributions on SS or diffuser vane at t*=7/16 for Case 1 (rated)
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Vortex pattern at t*=7/16 for Case 1 (rated)
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Local coordinates on boundary

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