K-2027 DME圧縮着火機関の噴霧および燃焼特性の解明(S26-5 DME・メタノール・燃料性状・燃料設計)(S26 新燃料,新燃焼,新原動機)

概要

論文の詳細を見る
In this study, the behavior of a DME spray and combustion process of a direct injection CI engine fueled with DME was observed by shadowgraph method. Also, fuel temperature measurements in the injector sac were performed to understand the transition process of DME from liquid to vapor. As the results, it was found that vaporization process is the important factor for characterizing the DME spray combustion. DME evaporates in a short time before the spray reaching 10mm, and the gasified DME penetrates the combustion chamber. Ignition occurs in the downstream part of the spray, where the DME is well evaporated. This is conceivably because the temperature near the nozzle decreased due to the latent heat of evaporation. The penetration of the gasified DME jet is comparable to that of the light oil spray plume.
社団法人日本機械学会の論文
2001-08-22