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3D numerical investigation of energy transfer and loss of cavitation flow in perforated plates
Engineering Applications of Computational Fluid Mechanics ( IF 6.1 ) Pub Date : 2020-08-29
Xiaogang Xu, Liang Fang, Anjun Li, Zhenbo Wang, Shuxun Li

Perforated plates are prevalently used in various integrated energy systems for flow restriction, vibration, and noise reduction. The characteristics of flow energy transfer and loss in perforated plates have a significant impact on its piping systems. The existing design and previous studies largely paid little attention to the characteristics of flow energy variation, resulting in severe performance issues and energy consumption. In this study, the characteristics of energy transfer and loss of cavitation flow with various pressure ratios in single and multi-stage perforated plates were numerically studied. The parameters of energy ratio and energy gradient were developed to effectively evaluate the degree and rate of flow energy variation. Results showed that the contribution to energy loss generated from orifice outlet was relatively larger than the inlet and that the degree and rate of energy variation deceased with the increasing stages during the flow in multi-stage models. Additionally, increased stages of perforated plate resulted in a multi-stage stepped energy drop in throttling orifices, and lead to obvious suppression of the cavitation. This work intends to provide references to cavitation control and energy consumption optimization in piping systems using a perforated plate.



中文翻译:

多孔板中能量传递和空化流损失的3D数值研究

穿孔板广泛用于各种集成能源系统中,以限制流量,降低振动和降低噪音。多孔板中流动能量传递和损失的特性对其管道系统有重大影响。现有的设计和先前的研究在很大程度上没有关注流动能量变化的特征,从而导致严重的性能问题和能量消耗。在这项研究中,数值研究了单级和多级多孔板中不同压力比下的能量传递和空化流损失。开发了能量比和能量梯度的参数,以有效地评估流动能量变化的程度和速率。结果表明,在多级模型中,孔口出口对能量损失的贡献要比入口大,并且能量变化的程度和速率随流量增加而降低。另外,增加的穿孔板级导致节流孔中的多级阶梯式能量下降,并导致明显的空化抑制。这项工作旨在为使用穿孔板的管道系统中的气蚀控制和能耗优化提供参考。并导致明显的空化抑制。这项工作旨在为使用穿孔板的管道系统中的气蚀控制和能耗优化提供参考。并导致明显的空化抑制。这项工作旨在为使用穿孔板的管道系统中的气蚀控制和能耗优化提供参考。

更新日期:2020-08-29
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