Numerical and Experimental Investigation on Spray Flux Distribution Produced by Liquid Sheet Atomization
Numerical and Experimental Investigation on Spray Flux Distribution Produced by Liquid Sheet Atomization
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DOI：
10.1115/gt2015-43364
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发表时间：
2015-06
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影响因子：
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通讯作者：
C. Inoue;A. Shimizu;Toshinori Watanabe;T. Himeno;S. Uzawa
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文献类型：
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作者：
C. Inoue;A. Shimizu;Toshinori Watanabe;T. Himeno;S. Uzawa
采用欧拉-拉格朗日混合方法对两股液态水以40°角撞击产生的液体雾化现象进行了数值模拟。在安静的环境空气中。为了计算具有液/气界面的流场，欧拉分析在固定的计算网格系统中进行。雾化发生后，每个液滴都转化为球形颗粒。粒子的运动是以拉格朗日形式跟踪的。为了验证所提出的欧拉-拉格朗日混合方法的有效性，利用高速摄像机进行了流动显示。为了获得喷雾特性的量化值，利用图形仪测量了液体质量流量在空间上的分布。雾化过程和雾化质量流量分布的数值模拟结果与实验结果基本一致，表明该方法具有预测液膜雾化雾化特性的潜力。该数值方法不仅可以计算喷嘴附近的非定常喷雾分布，还可以计算喷嘴下游的非定常喷雾分布。展示了实验难以测量的过渡状态下的喷雾质量流量分布。版权所有#2015
Eulerian-Lagrangian hybrid method is implemented for the prediction of liquid atomization phenomena produced by 2 liquid water jets impinging by an angle of 40 deg. in quiet ambient air. To calculate the flow fields with liquid/gas interface, Eulerian analyses are conducted inside a fixed computational grid system. After the atomization occurs, every droplet is converted to a spherical particle. The motion of particles are tracked in Lagrangian form. For the validation of the developed Eulerian-Lagrangian hybrid method, flow visualization by using a high-speed video camera is carried out. To obtain quantitative values of spray characteristics, the liquid mass flux distribution in space is measured by utilizing a patternator. Numerical and experimental results of atomization process and mass flux distribution of spray show a similarity, and thus the developed method is evaluated that it has potential to predict spray characteristics produced by liquid sheet atomization. The developed numerical method can calculate unsteady spray distributions not only at the plane close to the injector but also far downstream. The spray mass flux distribution in the transient state, which is hard to measure by experiment, is demonstrated.Copyright © 2015 by ASME