气泡发生结构对二级燃油雾化喷嘴性能影响的实验研究

Experimental Study of Atomization Characteristics on Effervescent Creation Equipment of a Multilevel Fuel Atomizer

基于一种气泡气动二级燃油雾化喷嘴,在其第二级雾化气动旋流部分结构参数一定的条件下,对第一级气泡雾化中的气、液预混芯与气泡生成室相配合的结构进行了优化设计,并利用可适性相位多普勒激光测速仪对不同气泡发生结构下的雾化场进行实验测试。结果表明,预混芯的气孔数目、气液面积比以及气泡生成室的长宽比均对喷嘴雾化效果有影响。

This research is based on a designed effervescent and air two-level atomizer. Tests are conducted with different structure parameters of the effervescent creation equipment and the same air swirling structure in a multilevel fuel atomizer,and then measured with APV system（adaptive phase/doppler velocimeter） ; consequently we analyze which structure is comparatively reasonable to create effervescence. The results of test show that the air aperture number, ratio of air-liquid area, ratio of length-width all have important influence on atomizing effect. The results are helpful for the improvement of combustion quality and the design of a high-effectual fuel atomizer.