Influencing factors of corona trigger threshold of fan blade

doi:10.16265/j.cnki.issn 1003-3033.2020.12.010

Abstract

Abstract: In order to calculate electric field strength at tip of fan blade when corona discharge occurs, scale models were established based on characteristics of corona discharge. Tests were performed for different lengths and rotation angles of fan blades, and corona environmental threshold and corona trigger threshold were calculated and their variation laws were compared under different conditions. The results show that corona environmental threshold decreases with increase of blade length but increases with that of rotation angle which is within 0-60°. The corona trigger threshold obtained from tests is about 337.15 kV/m, remaining generally constant in spite of length and angle changes, but it shows a certain fluctuation due to influence of atmospheric conditions and charged ions.

Key words: fan blade, corona trigger threshold, corona discharge, corona environmental threshold, electric field distortion

CLC Number:

X946

LI Xiangchao, JIAO Xue, CAI Lujin and XU Xiaopei. Influencing factors of corona trigger threshold of fan blade[J]. China Safety Science Journal, 2020, 30(12): 70-78.

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