由随机球体组成的螺旋填料床中的流态特征

IF 2.5 4区 工程技术 Q2 ENGINEERING, MECHANICAL Journal of Porous Media Pub Date : 2024-01-01 DOI:10.1615/jpormedia.2024049270
Mustafa Yasin Gökaslan, Mustafa Özdemir, Lütfullah Kuddusi
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引用次数: 0

摘要

填料床应用于许多领域,如热交换器、冷却系统、过滤和反应器。多孔介质增加了热传递,但同时也增加了压降。流态对流体的传热和泵送能力有很大影响。众所周知,当通道弯曲或单独填料时,压降会增大。关于多孔介质或曲线通道中的压降和流态的研究很多。然而,关于曲线填料床的压降和流动机制的研究并不多。在这项研究中,我们确定了当通道既是曲线通道又是多孔介质通道时的压降和流态。填料床有两种不同的曲率半径,直径分别为 71 毫米和 171 毫米,由不同颗粒直径(2.00 毫米、2.38 毫米和 3.17 毫米)的钢球填充。通过实验测量了这些螺旋多孔介质中的压降,并确定了每个试验室和钢球直径的流动状态。计算了每种流动状态下的渗透率、福希海默尔系数以及与埃尔金常数相对应的系数。曲率比的影响被解释为与直填料床的差异。确定曲线填料床的流态范围有助于更好地解释流体在这些流态中的传热和泵送功率。
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Characteristics of Flow Regimes in Spiral Packed Beds Composed of Randomly Spheres
Packed beds are used in many fields such as heat exchangers, cooling systems, filtration, and reactors. Porous media increase the heat transfer but increase the pressure drop and flow regimes are different according to the clear channel. The flow regime significantly affects the heat transfer and pumping power of the fluid. It is known that when the channel is either curved or packed separately, the pressure drop increases. There are many studies on pressure drop and flow regimes in porous media or curvilinear channels. However, there are not many studies on pressure drop and flow regimes in a curvilinear packed bed. In this work, the pressure drops and flow regimes were determined when the channel is both curved and porous media. The packed beds were formed with two different radii of curvature, 71 and 171 mm in diameter, and are filled from steel balls with different particle diameters of 2.00, 2.38 mm, and 3.17 mm. The pressure drop in these spiral porous media was measured experimentally and flow regimes were determined for each test chamber and ball diameter. In each flow regime, permeabilities, Forchheimer coefficients, and the coefficients corresponding to Ergün constants were calculated. The effect of the curvature ratio was interpreted as the difference from the straight packed beds. Determining the flow regime ranges of curved packed beds, it can help to better interpret the heat transfer and pumping power of the fluid in these regimes
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来源期刊
Journal of Porous Media
Journal of Porous Media 工程技术-工程:机械
CiteScore
3.50
自引率
8.70%
发文量
89
审稿时长
12.5 months
期刊介绍: The Journal of Porous Media publishes original full-length research articles (and technical notes) in a wide variety of areas related to porous media studies, such as mathematical modeling, numerical and experimental techniques, industrial and environmental heat and mass transfer, conduction, convection, radiation, particle transport and capillary effects, reactive flows, deformable porous media, biomedical applications, and mechanics of the porous substrate. Emphasis will be given to manuscripts that present novel findings pertinent to these areas. The journal will also consider publication of state-of-the-art reviews. Manuscripts applying known methods to previously solved problems or providing results in the absence of scientific motivation or application will not be accepted. Submitted articles should contribute to the understanding of specific scientific problems or to solution techniques that are useful in applications. Papers that link theory with computational practice to provide insight into the processes are welcome.
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