定容容器内伝ぱ火炎面の不安定性 : 不活性気体による希釈の影響

概要

論文の詳細を見る
The present work is a continuation of our previous study to obtain a fundamental understanding of instabilities of a flame front propagating in a constant-volume combustion chamber. In this report, attention was focused on effects of dilute gases on this phenomenon. Experiments were conducted in a disk-shaped constant-volume chamber of 100 mm diameter and 30 mm height with a window. The flames were visualized by instantaneous schlieren photography. It was found that the instabilities arise for lean hydrogen/oxygen mixtures diluted with argon as well as helium, wich can be explained as thermodiffusive effects. For methane or propane/oxygen mixtures, the diluent plays an important role. Using argon as a diluent renders the flame unstable in accord with the thermodiffusive theory, while using helium renders it stable which cannot be explained by this theory. For these mixtures diluted by helium, initial disturbances might be suppressed by viscosity.
一般社団法人日本機械学会の論文
1994-12-25