Experimental investigation of cavity stability for a gas-jet penetrating into a liquid sheet
Experimental investigation of cavity stability for a gas-jet penetrating into a liquid sheet
复制标题
气体射流穿透液层空腔稳定性的实验研究
DOI：
10.1063/1.4928895
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发表时间：
2015-08
影响因子：
4.6
通讯作者：
Fu Xin
中科院分区：
文献类型：
--
作者：
Liu Qi;Chen Wenyu;Hu Liang;Xie Haibo;Fu Xin
在各种工业应用中实施气体射流穿透液体层的过程时，通常需要生成稳定的空腔而没有液滴飞溅。在这项研究中，进行了实验来研究不同穿透参数下的腔体稳定性，包括不同的喷嘴直径、液层厚度、气体流速和射流高度。当保持其他参数固定但将喷嘴移动到靠近液层表面时，发现腔体经常受到壁射流的干扰，并且变得不稳定，伴随着喷射高度过低的液滴飞溅。通过高速摄像机拍摄空腔图像，以研究空腔性能，包括其尺寸、表面形态和液滴飞溅。进一步发现，低射流高度下强烈的壁面射流扰动通常会产生剧烈的表面波，只要表面波的高频振荡导致瑞利不稳定性，就会引起液滴飞溅。研究了不同穿透条件下引起空腔稳定性转变的临界射流高度，并进一步用局部修正弗劳德数作为归一化公式表示。最后给出了产生稳定穿透腔的条件的曲线拟合，为工业上的射流控制提供指导。
Generating stable cavity without droplets splatter is commonly required when process of a gas-jet penetrating into a liquid sheet is implemented in various industrial applications. In this study, experiments were carried out to investigate the cavity stability under different penetrating parameters, including different nozzle diameters, liquid sheet thicknesses, gas flow rates, and jet heights. When keeping other parameters fixed but moving the nozzle close to the liquid sheet surface, it was found that the cavity was frequently disturbed by the wall-jet and became unstable accompanied with droplets splatter at too low jet heights. Images of the cavities were captured by high speed video camera to study cavity performances, including its size, surface morphology, and droplets splatter. It was further found that violent surface waves were commonly generated by the strong wall-jet disturbance at low jet heights and droplets splatter was caused as long as Rayleigh instability happened due to higher frequency oscillation of the surface wave. Critical jet heights causing cavity stability transition were studied for different penetrating conditions, which were further expressed by a local modified Froude number as a normalized formulation. Curve fitting illustrating the conditions to generate stable penetrating cavities was given at last to provide guides for the jet controls in industry.
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DOI：
10.1115/1.3607705
发表时间：
1967-06
期刊：
Journal of Applied Mechanics
影响因子：
--
作者：
M. Poreh;Y. G. Tsuei;J. Cermák
通讯作者：
M. Poreh;Y. G. Tsuei;J. Cermák
影响因子：
1.8
作者：
Subagyo;G. Brooks;K. Coley;G. Irons
通讯作者：
Subagyo;G. Brooks;K. Coley;G. Irons
影响因子：
4.6
作者：
Li V. Zhang;P. Brunet;J. Eggers;R. Deegan
通讯作者：
Li V. Zhang;P. Brunet;J. Eggers;R. Deegan
影响因子：
1.8
作者：
N. Dogan;G. Brooks;M. Rhamdhani
通讯作者：
N. Dogan;G. Brooks;M. Rhamdhani
DOI：
10.1007/bf02644314
发表时间：
1974-05
期刊：
Metallurgical Transactions
影响因子：
--
作者：
R. Fruehan;L. J. Martonik
通讯作者：
R. Fruehan;L. J. Martonik