Reduction of flame development time using nanosecond-Pulsed high-Frequency discharges in flowing mixtures

Joseph K. Lefkowitz, Timothy Ombrello

Research output: Contribution to conferencePaperpeer-review

Abstract

This study explores the flame development rate of ignition kernels initiated by nanosecond-pulsed high-frequency discharges in a flowing methane/air mixture at an equivalence ratio of 0.6, velocity of 10 m/s, and pressure of 101 kPa. Both the pulse repetition frequency (PRF) and the number of pulses were varied in the range of 10 – 300 kHz and 1 – 50 pulses (≈ 3 – 150 mJ), respectively, to study the effects of power deposition rate and total energy deposition on the flame development rate. It was found that lowering the PRF increased the flame development rate, as long as the ignition kernel had high probability for success. It was also found that greater numbers of pulses increased the flame development rate, but was much more effective at 10 kHz PRF as compared to 300 kHz PRF.

Original languageEnglish
StatePublished - 2017
Externally publishedYes
Event10th U.S. National Combustion Meeting - College Park, United States
Duration: 23 Apr 201726 Apr 2017

Conference

Conference10th U.S. National Combustion Meeting
Country/TerritoryUnited States
CityCollege Park
Period23/04/1726/04/17

Keywords

  • Ignition
  • Nanosecond pulsed discharge
  • Plasma assisted combustion

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

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