【摘要】：提出了一種基于流注-先導放電理論的數(shù)值模擬方法來快速判斷直升機初始雷擊附著點。首先,根據(jù)標準SAE-ARP 5416A中規(guī)定的相關試驗方法,確定平板電極大小、直升機離邊界距離等參數(shù)。然后,利用Becerra-Cooray正極性先導起始和發(fā)展判據(jù)對UH-60"黑鷹"直升機的主旋翼翼尖、尾旋翼翼尖、水平尾翼以及機頭部位進行分析比較。最后,通過不斷改變平板電極電勢的方法,找到各個關鍵位置產(chǎn)生穩(wěn)定正極性先導所需的最小背景電場值,以此為依據(jù)來對其初始雷擊附著位置進行分析。結(jié)果表明,主旋翼翼尖最易成為初始雷擊附著位置,而機頭則較難成為初始雷擊附著位置。
[Abstract]:In this paper, a numerical simulation method based on the theory of streamer and pilot discharge is proposed to quickly determine the initial lightning attachment point of the helicopter. Firstly, according to the relevant test methods specified in standard SAE-ARP 5416A, the parameters such as the size of the plate electrode and the distance from the helicopter to the boundary are determined. Then, the main rotor tip, tail rotor tip, horizontal tail wing and nose position of the UH-60 "Black Hawk" helicopter are analyzed and compared by using the Becerra-Cooray positive lead initiation and development criterion. Finally, by changing the potential of the plate electrode continuously, the minimum background electric field value needed to produce the stable positive leader at each key position is found, based on which the position of initial lightning strike attachment is analyzed. The results show that the wingtip of the main rotor is the most likely to be the initial lightning stroke attachment position, while the nose is more difficult to become the initial lightning strike attachment position.
【作者單位】： 解放軍理工大學國防工程學院;解放軍理工大學電磁環(huán)境與電光工程國家級重點實驗室;總參工程兵第四設計研究院;
【基金】：國家自然科學基金項目(60971063) 國家重點實驗室基金項目(FD2015003)
【分類號】：V275.1
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本文編號：2145184