Analysis of nano-second pulse dbd plasma structure and energy efficiency evaluation for internal engine combustion enhancement

Hidemasa Takana, Hideya Nishiyama

Research output: Contribution to journalArticle

Abstract

A detailed computational simulations of a nano-second pulse DBD (Dielectric Barrier Discharge) streamer in lean methane-air mixture at pressure of 3 atm and temperature of 500 K were conducted for plasma assisted combustion. The DBD streamer propagation process with radical production has been clarified. The radicals are produced mostly at the streamer head with high electric field. The oxygen radical number density is the highest, followed by nitrogen radical, hydrogen radical and CH3 radical. The coupled energy increases more rapidly with applied voltage compared with oxygen radical number density, therefore, there exists the optimum operating voltage for oxygen radical production efficiency. Furthermore, the ignition delay time in lean premixed methane/air improves by nano-second pulse DBD discharge with applied voltage even at high pressure and high temperature conditions.

Original languageEnglish
Pages (from-to)1005-1015
Number of pages11
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume79
Issue number801
DOIs
Publication statusPublished - 2013 Jul 15

Keywords

  • Combustion enhancement
  • Functional fluid
  • Nano-second pulse discharge
  • Numerical simulation
  • Plasma
  • Radical production
  • Streamer

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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