Dynamic Behavior and Its Consideration of EHD Liquid Extraction Phenomenon Causing under DC or Low-Frequency AC Voltage  

作　　者：Ryoichi Hanaoka Yoji Fujita Takuma Kajiura Hidenobu Anzai 

机构地区：[1]Kanazawa Institute of Technology, 7-1 Ohgigaoka, Nonoichi, Ishikawa 921-8501, Japan [2]Hokkaido Electric Power Co., Inc., 2 Higashi 1-Chome, Odori, Chuo-ku, Sapporo, Hokkaido 060-8677, Japan [3]Fujikura Kasei, Co., Ltd., 5-13-1 Sakurada, Kuki, Saitama 340-0203, Japan

出　　处：《Journal of Energy and Power Engineering》2019年第6期229-239,共11页能源与动力工程（美国大卫英文）

摘　　要：This paper describes an experimental and theoretical study on an extraction phenomenon of liquids occurring at an air gap between the liquid surface and the electrode by applying a direct current (DC) or low-frequency alternating current (AC) voltage. Three liquids with a different physical property;2,3-dihydrodecafluoropenten, palm fatty acid ester oil and crude rapeseed oil are used as working liquids. The electrode configuration is the sphere or plane (high voltage electrode) to grounded plane electrode. The grounded plane electrode is fixed to the bottom of the test vessel with working liquid and the high voltage electrode is installed in an air above the liquid surface against the grounded plane electrode. The liquid surface swells towards the high voltage electrode by the increase of voltage and the liquid is extracted in a short time, thereafter the air gap between the liquid surface and the high voltage electrode is bridged at a thick liquid column. Such the liquid behavior displays unique features with voltage polarity effect for each working liquid. The relationship between the applied voltage, current variation, height of swollen liquid, force pulling liquid and dynamic feature of liquid is examined experimentally. The liquid behavior is considered theoretically based on experimental observations.

关 键 词：ELECTROHYDRODYNAMICS (EHD) extraction phenomenon SEMI-INSULATING and insulating liquids DC or LOW-FREQUENCY AC voltage dynamic behavior of liquids moisture removal effect in oil 

分 类 号：TK[动力工程及工程热物理]