Flow characteristics of submerged free jet flow from petal-shaped nozzle
Flow characteristics of submerged free jet flow from petal-shaped nozzle
复制标题
花瓣形喷嘴浸没自由射流的流动特性
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Ando
中科院分区：
文献类型：
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作者：
T. Shakouchi;Shota Iriyama;Y. Kawashima;K. Tsujimoto;T. Ando
喷流现象是流体力学领域中最重要的基本流动之一，它包括自由边界和壁面边界的剪切流以及大尺度的涡旋结构。此外，它还广泛应用于许多工业领域，用于加热、冷却、混合、扩散、灭火、推进等。另外，为了改善射流与周围环境之间的混合和扩散特性，人们进行了许多试验，例如使用各种非圆形喷嘴。本文对六瓣花瓣形特殊喷嘴的浸没自由射流的流动特性、混合和扩散特性进行了实验研究。预计6花瓣状自由射流由于具有较大的润湿周长和形成较大的旋涡结构，将具有良好的混合和扩散特性。：水下自由射流，六瓣形特殊喷嘴，流动特性，平均速度和脉动速度，射流扩散，卷吸流量，流动可视化，流动波动
Jet flow phenomenon is one of the most important basic flows in the field of fluid dynamics because it includes the free and wall bounded turbulent shear flows and large-scale vortex structures. In addition, it is used widely in many industrial fields for heating, cooling, mixing, diffusion, fire extinguishing, propulsion, and others. By the way, in order to improve the mixing and diffusion characteristics between the jet and surroundings there are many trials, for example, by using of various non-circular nozzles. In this study, the flow characteristics, mixing and diffusion properties, of the submerged free jet from the petal-shaped special nozzle with 6 petals are examined experimentally. It is expected that 6 petal-shaped free jet will have a good mixing and diffusion characteristics because of a large wetting perimeter and forming of large vortex structures. : Submerged free jet flow, 6-petal shaped special nozzle, Flow characteristics, Mean and fluctuating velocities, Spread of jet, Entrainment flow rate, Flow visualization, Flow fluctuation