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Research Papers: Multiphase Flows

The Analysis of the Impact of Particles on Cavitation Flow Development

[+] Author and Article Information
Boštjan Gregorc, Matjaž Hriberšek, Andrej Predin

 Department of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia e-mail: bostjan.gregorc@dem.si Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia e-mail: matjaz.hribersek@uni-mb.si Faculty of Energy Technology, University of Maribor, Hocevarjev trg 1, 8270 Krško, Slovenia e-mail: andrej.predin@uni-mb.si

J. Fluids Eng 133(11), 111304 (Nov 11, 2011) (8 pages) doi:10.1115/1.4005315 History: Received March 28, 2011; Revised October 10, 2011; Published November 11, 2011; Online November 11, 2011

The purpose of this paper is to present an analysis of the impact of solid particles on the development of cavitation flow conditions around a hydrofoil. Experimental studies were conducted in a cavitation tunnel with different mixtures of particles and water. The effect of the particles on the development of cavitation flows was modeled by using an additional phase particle dispersion model (Euler-Euler). Numerical modeling was performed using the CFD software. The impact on the cavity model with the parametric analysis of the entry conditions of particles in the calculation domain was investigated, with a focus on the solid shear viscosity. Another purpose of this research was to present the possibility of modeling the development of the vapor phase in the commercial CFD software package, while taking into account the impact of particles. This paper presents the results of the experimental measurements and their comparison with numerical simulations.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 10

Comparison of Mt /Mt 0 of simulations and experimental measurements

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Figure 1

Cavitation tunnel sketch [12]

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Figure 9

Comparison of water velocity simulation without using μd (left) and with using μd (right) at equal Δp = 0.35 bars and ξ = 0.0032

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Figure 2

Schematic of the profiled testing hydrofoil

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Figure 3

A case measurement Mt of the profiled testing hydrofoil

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Figure 4

Experimental comparison of torque and Δp on hydrofoil using pure water and particles

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Figure 5

Analysis of the impact of solid shear viscosity μd , a change in Mt /Mt 0

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Figure 6

Impact of change μd and Mt /Mt 0 (Qi  = 15 kg/s and Δp = 0.4 bars)

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Figure 7

Comparison of vapor volume fraction simulation without particles (left) and with particles (right ξ = 0.0032) at equal Δp = 0.02 bars, Qi  = 15 kg/s

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Figure 8

Comparison of vapor volume fraction simulation without particles (left) and with particles (right ξ = 0.0032, μd  = 0.87) at equal Δp = 0.35 bars

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