選択拡散効果を考慮した乱流燃焼速度の整理〔熱工学, 内燃機関, 動力など〕

概要

論文の詳細を見る
In our previous work, we found that the preferential diffusion in a turbulent flame played an important role in its turbulent combustion characteristics, and estimated the local burning velocity in premixed turbulent combustion experimentally, taking account of the preferential diffusion effect. In this study, a model which takes the preferential diffusion effect into consideration, is proposed to predict the premixed turbulent burning velocity, using the local burning velocity as a reference instead of the original laminar burning velocity. The model can be explained as follows. The turbulence affects the turbulent burning velocity by increasing the flame surface area and stretching the flame. Consequently, the turbulent burning velocity and quenching limit are determined by the balancing of both effects. The predicted velocities are compared with the measured turbulent burning velocities such that the fuel, equivalence ratio and laminar burning velocity were varied extensively. As a result, quantitative accuracy of this simple model is confirmed.
一般社団法人日本機械学会の論文
1997-10-25