日本機械学会論文集
Online ISSN : 2187-9761
熱工学,内燃機関,動力エネルギーシステム
EGRがディーゼル噴霧の着火・燃焼に及ぼす影響
小堀 繁治
著者情報
ジャーナル フリー

81 巻 (2015) 828 号 p. 15-00031

詳細
PDFをダウンロード (2385K) 発行機関連絡先
抄録

The object of this study is to investigate experimentally effects of EGR gas on the ignition delay and the combustion, in a diesel spray using a rapid compression-expansion machine. EGR gas has CO2, H2O and N2. Therefore, we also research the influence of each gas on the ignition and the combustion individually. The results show that changes of ignition delay are few until the EGR rate of 20 %. When the EGR rate reaches 25 %, ignition delay increases drastically. The gradient of temperature against the ignition delay in arrhenius plot changes at 900 K. That phenomenon is independent of an ambient gas composition. Additions of CO2 and H2O to air prevent to lengthen ignition delay because of a low oxygen condition. Additions of N2 to air have longer ignition delay than EGR condition. And the reduction in the ambient gas oxygen concentration tends to make the two-stage combustion vigorous.

著者関連情報
© 2015 一般社団法人日本機械学会
前の記事 次の記事
feedback
Top