Stirring systems with two rotational three‐bladed propellers were analyzed using computational fluid dynamics. The propellers are located at three heights and seven angles in a tank with 9 m radius. The fluid was characterized by non‐Newtonian rheology and simulated by applying the k‐ε turbulence model and the standard k‐ω model. Reynolds numbers were estimated. High fluid speeds were obtained with the propellers located at a height of 2 m and oriented at 90° with respect to the tank radius. In the top regions of the tank, the fluid velocity was generally less intense and less affected by the angle setting. The configurations identified as good mixing systems showed power consumptions broadly distributed around 30 kW.

中文翻译：

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基于数值模拟的沼气池厌氧消化池混合过程分析

使用计算流体力学分析了带有两个旋转三叶螺旋桨的搅拌系统。螺旋桨位于半径为9 m的油箱中，处于三个高度和七个角度。该流体具有非牛顿流变学特征，并通过应用k-ε湍流模型和标准k-ω模型进行了模拟。雷诺数是估计的。螺旋桨位于高度为2 m且相对于罐半径成90°的位置时，获得了很高的流体速度。在水箱的顶部区域，流体速度通常强度较小，受角度设置的影响较小。被确定为良好混合系统的配置显示功耗大致分布在30 kW左右。