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Effect of oil flow velocity on bubble dynamics in transformer oil under extremely nonuniform electric field
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Yan ZHONG, Richeng LUO, Guanfei YANG, Peng LIU, Huayu DENG, Jin YAN
Insulating Materials | 2023, 56(6) : 82 - 87
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Insulating Materials | 2023, 56(6): 82-87
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Effect of oil flow velocity on bubble dynamics in transformer oil under extremely nonuniform electric field
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Yan ZHONG, Richeng LUO, Guanfei YANG, Peng LIU, Huayu DENG, Jin YAN
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  • School of Electrical and Information Engineering, Changsha University of Technology, Changsha 410004, China
Published: 2023-06-20 doi: 10.16790/j.cnki.1009-9239.im.2023.06.013
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In order to clarify the influence rule of flow velocity of transformer oil on the migration and distortion of suspended bubbles in oil under complex electric field, we analyzed the migration path and distortion degree of bubbles at different flow velocity by numerical simulation. The results show that when the oil flow velocity is lower than 0.24 m/s, the shape of bubble changes periodically, and the change frequency is about 100 Hz. The oil flow velocity is positively correlated with the offset distance form the high-pressure cone, the distortion rate, and the inner maximum electric field intensity of the bubble.

transformer oil  /  extremely nonuniform electric field  /  bubble migration trajectory  /  distortion  /  oil flow velocity
Yan ZHONG, Richeng LUO, Guanfei YANG, Peng LIU, Huayu DENG, Jin YAN. Effect of oil flow velocity on bubble dynamics in transformer oil under extremely nonuniform electric field[J]. Insulating Materials, 2023 , 56 (6) : 82 -87 . DOI: 10.16790/j.cnki.1009-9239.im.2023.06.013
Year 2023 volume 56 Issue 6
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doi: 10.16790/j.cnki.1009-9239.im.2023.06.013
  • Receive Date:2022-06-29
  • Online Date:2025-11-21
  • Published:2023-06-20
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  • Received:2022-06-29
  • Revised:2022-08-08
Affiliations
    School of Electrical and Information Engineering, Changsha University of Technology, Changsha 410004, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.06.013
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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