An experimental study to assess the impact of discharge frequency of the dielectric barrier discharge on ignition process of premixed mixture under elevated pressure
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20239264
- Paper/Info type
- Other International Conferences
- Pages
- 1-11(Total 11 p)
- Date of publication
- Aug 2023
- Publisher
- JSAE & SAE
- Language
- English
- Event
- 2023 P, E&L
Detailed Information
| Category(E) | IC3 Fundamentals of Mixture Formation and Combustion |
|---|---|
| Author(E) | 1) Saurabh AGRAWAL, 2) Shuya YAMAMOTO, 3) Naoto HORIBE, 4) Jun HAYASHI, 5) Hiroshi KAWANABE |
| Affiliation(E) | 1) Kyoto University, 2) Kyoto University, 3) Kyoto University, 4) Kyoto University, 5) Kyoto University |
| Abstract(E) | Dielectric Barrier Discharge (DBD) plasma coupled with repeating pulse discharge holds huge potential in LTP igniters owing to its capability to create volumetric discharge and prevent streamer-to-arc transition. When igniting a high pressure premixed mixture with a dielectric barrier discharge (DBD) ignition system, it is essential to understand the flame kernel formation and development process. In this research, a DBD igniter with multiple ground electrodes was applied to achieve volumetric ignition. The influence of discharge frequency and total duration of the DBD on the ignition process was experimentally evaluated using high-speed imaging. The discharge frequency of the DBD considered in this study are 40, 100 and 300 kHz. High-speed imaging was performed in a constant volume vessel for DBD in air to understand the energy released during the discharge process. Methane-air premixed mixture were ignited in a constant volume combustion chamber. Additionally, the flame kernel formation and development process were visualized using OH* chemiluminescence. Results showed that the energy of DBD released during a single discharge cycle decreases, but the power of the discharges increases as the frequency increased. The ignition probability increased and the time for the flame propagation decreased under high frequency because the increased power of the discharges efficiently rises the local gas temperature near the electrodes and promotes the production of radicals. |
