燃料の組成の変化が予混合火炎の挙動に及ぼす影響

抄録

Flame motion variation of a stagnation flow premixed flame with gas component transition between mixture A (methane:84%, ethane:13.3%, propane:2.7%) and B (methane:92%, ethane:6.7%, propane:1.3%) is discussed. Estimation of burning velocity and flame temperature of mixture A and B by CHEMKIN-PRO show little difference. In experiments, transition from mixture A to B and B to A were performed for a stagnation flow premixed flame. The transition time changes from 1 sec to 10 sec, keeping flow velocity and equivalence ratio constant at 0.8 m/s and 0.7. The flame position was measured by a picture taken by high speed video camera with 125 fps. Experimental results show overshoot of flame position during the transition. The overshoot was much significant for shooter transition time.