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I-V characteristics and liquid motion in needle-to-plane and razor blade-to-plane configurations in transformer oil and liquid nitrogen

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4 Author(s)
Takashima, T. ; Dept. of Electr. Eng., Kanazawa Univ., Japan ; Hanaoka, R. ; Ishibashi, R. ; Ohtsubo, A.

Current-voltage (I-V) characteristics are measured in a negative needle-to-plane configuration and a negative razor blade-to-plane configuration in transformer oil and liquid nitrogen. Linear pots of V vs. I12/ in the former configuration of V vs. I13/ in the latter configuration are obtained respectively in the space-charge limitation (SCL). The liquid motions in the above two configurations in SCL are computed respectively from both the Navier-Stokes equation and the continuity equation by the finite-difference method. From the experimental and computational results of the liquid motions, the relations between V and I in two configurations are derived, respectively.

Published in:

Electrical Insulation, IEEE Transactions on  (Volume:23 ,  Issue: 4 )