Improvement of Spray Performance of a Low-Pressure Atomizer by Conical Sheet Formation

概要

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The conventional swirl-type injector used as a single-point injector has some faults, in that at low fuel flow rate it becomes difficult to generate a thin fuel film, and spray characteristics deteriorate. A new type of single-point injector is proposed in this paper to solve the above problem and to improve its atomization performance. The newly designed injector is of the impingement type. Liquid fuel jets impinge on the solid wall and form thin liquid films ; then they are issued from the injector. This type of injector has the following advantages. The impingement-type injector can generate a thin liquid film even at a lower liquid flow rate. The liquid film issued from the impingement-type injector is thinner and spreads out more widely. The droplets generated by the disintegration of the thin liquid film are finer. The azimuthal mass flux distribution of droplets is more uniform. The upwash generated by the impingement of the films promotes film spreading. However, a large upwash checks the uniform azimuthal distribution of droplet mass flux.
一般社団法人日本機械学会の論文
1994-11-15