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Particle Concentration Measurements in a Centrifugal Slurry Pump Using an A-Scan Ultrasound Technique

Furlan, John Michael
http://rave.ohiolink.edu/etdc/view?acc_num=case1301325325

Abstract Details

2011, Doctor of Philosophy, Case Western Reserve University, EMC - Mechanical Engineering.
In the design of slurry transport equipment used in a variety of industries, the effects of solid particle concentration on hydraulic performance and wear need to be considered. An ultrasound A-mode imaging method has been developed to obtain local particle concentration measurements in slurry flows. Acoustic properties of slurry flows including velocity, backscatter, and attenuation as a function of volume fraction of solid particles, are examined in this study using various transducers. The most suitable transducer is selected to obtain concentration measurements in slurry flows. The technique is used to obtain concentration profiles in a homogeneous (vertical flow) and a non-homogeneous (horizontal flow) slurry flow of soda lime glass beads (195 µm diameter) and water through a one inch diameter loop with solid particle concentrations ranging from 1-10 % by volume. For horizontal flow, profiles are obtained for average flow velocities of 1.2, 2.0, 3.0, and 3.5 m/s. The algorithm developed utilizes acoustic backscatter and attenuation measurements obtained from the homogeneous loop as calibration data in order to obtain concentration profiles in other (i.e. non-homogenous) flow regimes. A computational study using FLUENT is performed and a comparison is made with the experimental results. A reasonable agreement between the experimental and computational results is observed in the one inch pipe. Following transducer selection and refinement and validation of the technique, it is employed to obtain local particle concentration measurements at multiple locations within the casing of a centrifugal slurry pump. A comparison is made between the experimental results and computational results using a two phase Eulerian-Eulerian finite element model. Computational fluid dynamics (CFD) and Experimental results at locations F→I share the same trends and relative patterns for differing locations but have substantial differences in magnitude. The CFD consistently shows higher concentration magnitudes than the experimental data. These differences are most likely a result of an un-matched casing inlet concentration boundary condition.
Jaikrishnan Kadambi, PhD (Committee Chair)
Yasuhiro Kamotani, PhD (Committee Member)
Iwan Alexander, PhD (Committee Member)
Sree Sreenath, PhD (Committee Member)
200 p.
Mechanical Engineering
slurry flow; ultrasound; particle concentration measurement; Centrifugal Pump

Recommended Citations

Citations

  • Furlan, J. M. (2011). Particle Concentration Measurements in a Centrifugal Slurry Pump Using an A-Scan Ultrasound Technique [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1301325325

    APA Style (7th edition)

  • Furlan, John. Particle Concentration Measurements in a Centrifugal Slurry Pump Using an A-Scan Ultrasound Technique. 2011. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1301325325.

    MLA Style (8th edition)

  • Furlan, John. "Particle Concentration Measurements in a Centrifugal Slurry Pump Using an A-Scan Ultrasound Technique." Doctoral dissertation, Case Western Reserve University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1301325325

    Chicago Manual of Style (17th edition)

case1301325325
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© 2011, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.