To enhance the gas‐liquid mixing performance in stirred tanks, the grid‐disc impeller was designed by replacing the solid disc of the standard Rushton impeller with a grid disc. Gas‐liquid hydrodynamics of the new impeller was studied by employing the Eulerian‐Eulerian two‐phase model coupled with the dispersed k‐ε turbulence model. Rotation of the impeller was simulated with the multiple reference frame method. Flow field, gas holdup, and power consumption were investigated and compared with the standard Rushton impeller. The numerical method was validated by comparing the gas holdup with literature. The grid‐disc impeller performed better than the Rushton impeller in terms of gas dispersion performance, axial pumping capacity, and energy requirement, indicating its potential for gas‐liquid mixing applications.

中文翻译：

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网格盘式叶轮搅拌罐中的气体-液体混合

为了提高搅拌罐中的气液混合性能，设计了栅格盘式叶轮，方法是将标准Rushton叶轮的固体盘替换为栅格盘。通过使用欧拉-欧拉两相模型和分散的k-ε来研究新叶轮的气液流体动力学湍流模型。叶轮的旋转采用多参考框架法进行模拟。研究了流场，气体滞留量和功耗，并与标准Rushton叶轮进行了比较。通过将气体滞留量与文献进行比较，验证了数值方法的有效性。在气体分散性能，轴向泵送能力和能量需求方面，格栅盘式叶轮的性能优于Rushton叶轮，表明其在气液混合应用中的潜力。