This paper presents effect of wall geometry in a wall-impingement type jet engine atomizer. The effects of pressure atomization with the wall impingement on the atomization characteristics have been examined in a real scale jet engine atomizer. The air velocity was varied from 41 to 92 m/s and the liquid injection pressure was from 0.5 MPa to 7.5 MPa. The atomization characteristics were evaluated by the droplet size ( S.M.D. ) by using a light scattering sizing ( LDSA ). Combining the pressure atomization with the air-blasting gives remarkable improvement of the atomization, which comes from the contribution of droplets produced by the pressure atomization mode. However, at the same time, liquid cluster was observed, which dropped from the atomizer. The liquid cluster is considered to have bad effects on combustion for jet engines. As a result, it is shown that the wall geometry have remarkable effects on the liquid atomization and on the prevention of the liquid cluster.
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机译：本文介绍了壁撞击式喷气发动机雾化器中壁几何形状的影响。在实际规模的喷气发动机雾化器中已经检查了壁撞击的压力雾化对雾化特性的影响。空气速度从41到92 m / s变化，液体注入压力从0.5 MPa到7.5 MPa。通过使用光散射施胶（LDSA），通过液滴尺寸（S.M.D.）评价雾化特性。将压力雾化与鼓风相结合可以显着改善雾化效果，这归因于压力雾化模式产生的液滴。然而，与此同时，观察到液体团簇，其从雾化器掉落。液体团簇被认为对喷气发动机的燃烧有不良影响。结果表明，壁的几何形状对液体雾化和防止液体团簇具有显着的影响。
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