Plasma and Fusion Research

Volume 15, 1206030 (2020)

Rapid Communications

Influence of Laser Incident Angle on Laser Breakdown-Assisted Long-Distance Discharge Ignition (LBALDI)
Kazuya IWATA, Hiroki KOIDE, Shun SAKAMOTO, Osamu IMAMURA, Yasunori OHKUMA, Hiroshi YAMASAKI, Eiichi TAKAHASHI1) and Kazuhiro AKIHAMA
Graduate School of Industrial Technology, Nihon University, Narashino 275-8575, Japan
1)
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8564, Japan
(Received 13 March 2020 / Accepted 25 March 2020 / Published 8 June 2020)

Abstract

We have developed a new volumetric ignition method called Laser Breakdown-Assisted Long-distance Discharge Ignition (LBALDI). In LBALDI, laser breakdown plasma is utilized to assist spark discharge by facilitating formation of ionization channel. It is expected to improve lean ignitability limit by long distance discharge for extended initial flame kernel, which was proved by our previous research. The authors investigated the influence of laser incident angle on the probability of discharge by LBALDI. It was found that discharge was the most successful when the incident laser was directed perpendicular to the discharge path.

Keywords

laser breakdown, spark ignition, laser breakdown-assisted long-distance discharge ignition, spark discharge, laser incident angle, discharge probability

DOI: 10.1585/pfr.15.1206030

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