IEEJ Transactions on Power and Energy
Online ISSN : 1348-8147
Print ISSN : 0385-4213
ISSN-L : 0385-4213
Hydrodynamic Verification for Streaming Electrification of Petroleum
—Distinctive Character of Static Charge Relaxation in Relaxation Pipe—
Naotake KitamuraHiroyasu Shingu
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2006 Volume 126 Issue 8 Pages 798-806


We have developed the Relaxation Pipe (RP) for the prevention of electrostatic charging hazard on a transportation pipe system in petroleum industry. This paper describes that many factors of RP have been discussed, and we have obtained a 100% relaxation factor of discharging rate of static charge.
The velocity distribution of flowing petroleum in RP must be known accurately to make a more effective RP, because many hydrodynamic factors are involved obscurely decreasing the relaxation factors. Our experimental results discovered their hydrodynamic factors. We have measured a velocity distribution of kerosene in the RP using a laser Doppler velocimeter (LDV), and we have a computer simulation of the velocity distribution of flowing kerosene with the Navier-Stokes equation. These could be extremely useful for designing more effective RP.

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© 2006 by the Institute of Electrical Engineers of Japan
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