燃烧室内同向多股大速差射流的流动特征

Research of Flow Characteristics of Multi-jets in the Same Direction and in Great Velocitv Difference in Combustion Chamber

采用冷态模型试验的方法，以自行设计的低热值煤气烧嘴为对象，研究了其同向大速羞射流燃烧室内气流的流动特征。结果表明：环状多股高速空气流对中心低速煤气流的强烈引射卷吸以及少量一次风造成煤气射流的一定程度的旋转将产生很大的负压区和回流区，有利于实现空气和煤气的均匀混合与稳定燃烧。

The flow characteristics of multi-jes in the same direction and in great velocitydifference in combustion chamber were researched by the cold mould simulating test of self-designedlow- calorie value gas burner.The results showed that the large negative pressure region and back-flow region would be produced by the multi-annular jets with high-velocity air involve intensivelythe central low-velocity gas jet and by virtue of the small main air volume resulting by some extentcirculation of gas jet.These have the advantage of realising homogeneously mixing between air jetsand gas jet and combusting steadily.