Abstract The paper considers the approaches frequently used to model pressure drop in a granular layer. These are a model of a hydraulic circuit element, a Lockcart–Martinelli model, and a generalization of the Darcy–Forchheimer model. A new model, representing a generalization of the gas dynamics equations to a two-phase flow, is proposed. The results of the considered models verification by two groups of experimental data obtained at different facilities are presented. The experiments employed granular beds with a height of 50 mm, 100 mm, 200 mm, 250 mm, 355 mm made of steel balls with a diameter of 2 mm, 2.123 mm and 4 mm. The experimental data cover the following range of operational parameters: inlet pressure from 0.6 to 15.3 MPa, flow quality at the inlet from 0.002 to 0.300, and mass velocity from 150 to 1200 kg/m2s. The results of the pressure drop calculation based on the known mass velocity and the inverse calculation of mass velocity from the known pressure drop have shown the advantages of the proposed new model, which has an analytical solution.

中文翻译：

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模拟通过颗粒床的强制汽液流的质量速度和压降

摘要 本文考虑了常用的方法来模拟颗粒层中的压降。它们是液压回路元件模型、Lockcart-Martinelli 模型和 Darcy-Forchheimer 模型的推广。提出了一种将气体动力学方程推广到两相流的新模型。介绍了通过在不同设施获得的两组实验数据对所考虑的模型进行验证的结果。实验采用由直径为2 mm、2.123 mm和4 mm的钢球制成的高度为50 mm、100 mm、200 mm、250 mm、355 mm的颗粒床。实验数据涵盖以下操作参数范围：入口压力从 0.6 到 15.3 MPa，入口处的流动质量从 0.002 到 0.300，质量速度从 150 到 1200 kg/m2s。