Experimental analysis of initial flame kernel development in spark ignition process of ethanol/air mixture under turbulent condition
乱流場でのエタノール/空気予混合気の火花点火における初期火炎核の形成挙動の実験的解析
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20214829
- Paper/Info type
- Symposium Text
- Pages
- 1-6(Total 6 p)
- Date of publication
- Dec 2021
- Publisher
- JSAE & JSME
- Language
- Japanese
Detailed Information
| Author(J) | 1) 山口 拓登, 2) 中谷 辰爾, 3) 任 方思, 4) 津江光洋 |
|---|---|
| Author(E) | 1) Takuto Yamaguchi, 2) Shinji Nakaya, 3) Ren Fangsi, 4) Mitsuhiro Tsue |
| Affiliation(J) | 1) 東京大学, 2) 東京大学, 3) 東京大学, 4) 東京大学 |
| Affiliation(E) | 1) Tokyo University, 2) Tokyo University, 3) Tokyo University, 4) Tokyo University |
| Abstract(J) | 乱流場での初期火炎核は流速勾配や曲率による伸長が火炎核の成長や局所消炎，火炎面の不安定性に影響するほか燃料の拡散特性や化学反応特性が火炎伝播限界に影響する．そのため混合燃料での物性値の評価は困難であり評価手法の確立や燃焼形態の理解が急務である．本研究では他成分代替燃料の点火や燃焼挙動の理解とモデリングを目標とし，特性に影響するパラメータを燃料ごとに求め，混合燃料に拡張可能な解析手法の確立を目指す． Translation |
| Abstract(E) | In this study, initial flame kernel developments of lean ethanol/air and methanol/Air mixtures under isotopic turbulent conditions was investigated experimentally with a high-speed camera. Time-resolved Schlieren photography images were observed with measurements of the ignition energy. The minimum ignition energy (MIE) was evaluated in deferent turbulent intensities. In addition, numerical simulation of one-dimensional free laminar flame and counterflow premixed flames for ethanol/air and methanol/air mixtures were conducted in order to obtain laminar combustion parameters such as the burning velocity, the flame thickness, and the Markstein length. These parameters were validated with the experimental results. Based on the parameters, the ignition process under turbulent conditions were discussed in the present study. |
