Invetigation into lightning attachment processes and modification of return stroke modeling

2014 Fiscal Year Final Research Report

• Project/Area Number: 23403007
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Social systems engineering/Safety system
• Research Institution: Gifu University
• Principal Investigator: WANG Daohong 岐阜大学, 工学部, 准教授 (20273120)
• Co-Investigator(Kenkyū-buntansha): TAKAGI Nobuyuki 岐阜大学, 工学部, 教授 (80179415)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 落雷 / 雷害 / 帰還雷撃 / 最終雷撃過程 / 放電

Outline of Final Research Achievements

We have developed a high speed optical imaging system specifically designed for studying the lightning attachment process. We have installed the system at the International Center for Lightning Research and Testing (ICLRT), located in north-central Florida for 4 years and have succeeded in observing the lightning attachment processes for more than 100 return strokes contained either in rocket-triggered lightning and natural lightning discharges. We have analyzed those observed data and obtained several new findings on the lightning attachment processes, particularly, the return stroke initiation processes. Based on those results, we have proposed a new return stroke model by taking into account the return stroke initiation processes.

Free Research Field

電気工学