一种离心喷嘴多孔蒸发管的蒸发率实验

Experimental study of evaporation rate for multihole vaporizer with pressure swirl atomizer

发展了一种用于微小型燃气轮机燃烧室的多孔蒸发管,燃油通过离心喷嘴供入蒸发管上游,空气经喷嘴下游的多个离散小孔进入蒸发管,燃油在蒸发管内与空气混合并蒸发.测试了离心喷嘴的喷雾特性,并主要对该多孔蒸发管的燃油蒸发率进行了实验.结果表明:对于这种多孔蒸发管,影响蒸发率的主要因素是进气温度和离心喷嘴的喷雾特性,当进气温度超过480K,煤油接近完全蒸发,雾化颗粒度越小,相对流速越大,蒸发完全程度越高.

A design multihole vaporizer was developed for micro gas turbine combu stor.Pressure swirl atomizer was used to atomize kerosene first and was fitted a t entrance of multihole vaporizer.A lap of holes were distributed around multiho le vaporizer wall of nozzle downstream,which were used to mix and vaporize keros ene.Spray characteristics of pressure swirl atomizer was measured,and vaporizati on rate of the multihole vaporizer was studied experimentally.The experimental r esults show that the air temperature and spray characteristics of pressure swirl atomizer are major influence factor to vaporization rate for multihole vaporize r.Kerosene is completely vaporized when the vaporizer inlet temperature exceeds 480 K.The smaller the kerosene particle size,the greater relative velocity,the h igher the level of evaporation achieved.