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Ultrasound-modulated twin-fluid atomization of a liquid jet

机译:液体喷射的超声调制双流体雾化

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摘要

A resonant liquid capillary wave theory which extends Taylor'sndispersion relation to include the sheltering effect of liquid surfaceninclination caused by air flow is presented. The resulting dispersionncurves are compared to new experimental results of how drop-size andnsize distributions vary with surface tension and air velocity in bothnairblast and ultrasound-modulated twin-fluid atomization of liquids withna constant kinematic viscosity of 2 cSt. Good agreements between thentheoretical predictions of relative growth rates of the capillary wavesnand the experimental results of drop-size and size distributions led tonthe conclusion that Taylor-mode breakup of capillary waves plays a verynimportant role in twin-fluid (airblast) atomization of a liquid jet.nThus, the ultrasound-modulated twin-fluid atomization not only verifiesnthe capillary wave mechanism but also provides a means for controllingnthe drop-size and size distributions in twin-fluid atomization, whichnhas a variety of applications in fuel combustion, spray drying, andnspray coating
机译:提出了一种共振液体毛细管波理论,该理论扩展了泰勒的色散关系,以包括由气流引起的液体表面倾角的掩蔽作用。将所得的分散曲线与新的实验结果进行了比较,该实验结果是在恒定运动粘度为2 cSt的喷枪和超声调制双流体雾化中,液滴尺寸和尺寸分布如何随表面张力和空气速度变化。毛细管波的相对增长率的理论预测与液滴尺寸和尺寸分布的实验结果之间的良好一致性得出了这样的结论:毛细管波的泰勒模式破裂在液体射流的双流体(鼓风)雾化中起着非常重要的作用因此,超声调制的双流体雾化不仅验证了毛细管波机理,而且还提供了一种控制双流体雾化中液滴尺寸和大小分布的方法,在燃料燃烧,喷雾干燥和n喷涂中有多种应用

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