关键词: 火焰根部； V型钝体尺寸；贫油预混燃烧

Abstract: In order to understand the detailed mechanism of flame stabilization，the effects of the characteristics of the flamebases on the flame stabilization are investigated. Two dimensional premixed flames after the V-gutters for different sizes in 2-D passages under different inlet velocities are performed，and the flame bases are investigated. The inlet mixture of kerosene and air is at Φ=0.6，300K and 0.1MPa. The results show that the flamebases characteristics，recirculation zones characteristics and the movements of flamebases location with different inlet velocities are not the same for small ，middle and large size V-gutters. When the V-gutter size is small，such as D=1mm，as the inlet velocity increases from 0.4m/s to 0.48m/s，the movement of one flamebase is 4.5mm downstream. When V-gutter size is medium such as D=8mm，as the inlet velocity increases from 1m/s to 5m/s，the movement of the flamebase is first 7mm downstream and then 3.7mm upstream. When V-gutter size is large，such as D=32mm，as the inlet velocity increases from 5m/s to 25m/s，the movement of each flamebase is 2mm upstream.

Key words: Flamebases；V-gutter size；Lean premixed combustion