Theoretical, numerical, and experimental study of electrohydrodynamic pumping in vertical configuration
An induction electrohydrodynamic (EHD) pump is studied theoretically, numerically, and experimentally. The pump which is in an axisymmetric, vertical configuration is investigated in both forward and backward modes. The theoretical model includes the effect of entrance conditions, buoyancy effects, and secondary flow. A complete set of numerical solutions is presented to show the influence of the controlling factors in operating an induction EHD pump. The experimental results seem to be in good agreement with the numerical solutions. Velocities four times higher than the natural circulation speed were readily achieved. Experimentally, the ion drag EHD pump is briefly studied. In the past, ion drag pumps were avoided because of expected degradation of the insulating ability of fluids such as transformer oils. The effects of long term low level charge injection on liquid dielectrics at levels sufficient to be useful in a pump is investigated. The results indicate that the exposure to electrodes at high voltage decreases the electric conductivity of the oils. Direct applications of the EHD pump include cooling both high-power underground cables and electric equipment such as transformers. This work is intended to provide the necessary information on the controlling factors of an EHD pump for a better design.
- Research Organization:
- Illinois Univ., Urbana (USA)
- OSTI ID:
- 5547855
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420200 -- Engineering-- Facilities
Equipment
& Techniques
640440* -- Fluid Physics-- Electrohydrodynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CABLES
CONDUCTOR DEVICES
DIELECTRIC MATERIALS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTROHYDRODYNAMICS
EQUIPMENT
FARADAY INDUCTION
FEASIBILITY STUDIES
FLUID MECHANICS
HYDRODYNAMICS
INDUCTION
INSULATING OILS
MATERIALS
MECHANICS
NUMERICAL SOLUTION
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PERFORMANCE TESTING
PUMPS
TESTING
TRANSFORMERS