双燃料喷口间距与火焰长度关系

Relationship Between the Space of Two Spouts and the Flame Length

为了解扩散燃烧中燃烧器的结构与火焰长度之间的关系,在前人工作的基础上,以双燃料喷口为研究对象,研究火焰长度随喷口间距变化的规律.研究表明:当喷口间距在0.5～2.0倍喷口直径范围内变化时,如果燃气速度一定,火焰长度将随喷口间距发生周期性的改变,变化的周期约为0.5个喷口直径;同流空气速度的大小对火焰长度变化周期的影响不明显.

Abstract： To see the relationship between the structure of a combustor and the flame length in diffusion combustion, variation of the flame length with spouts space is numerically researched based on the existing work. Result shows that if velocity of gas is unvaried, the length of flame will periodically changewith the space between the spouts, which is from 0.5 to 2 times diameter of the spouts. The period is about 0.5 times diameter of the spouts. The velocity of co-flow air is not effective on periodicity of the length of flame that changes with the spouts space.