啤酒发酵液低温冷却过程的CFD模拟

CFD Model of Low-temperature Cooling Process of Beer Fermenting Liquid

应用传递过程原理和计算流体动力学(CFD)知识,建立了啤酒发酵后期冷却阶段发酵液热量与动量传递的CFD模型,并进行了数值模拟,得到了啤酒发酵罐内发酵液的热量和动量分布。模拟结果表明,啤酒发酵后期冷却过程中发酵液温度上高下低,轴向分层明显,而径向温度梯度很小,发酵液的运动复杂,局部小环流众多,严重影响其温度分布,这对于改进传统的啤酒发酵后期冷却温控策略有较重要的理论与实践意义。

A CFD model of heat and momenta transferring of beer fermenting liquid in late fermentation stage and in cooling process was set up by computational fluid dynamics （CFD） technique and transport processing principle. The heat and momenta distribution of fermenting liquid in beer fermentation tower was analyzed through numerical simulation. The results suggested that the temperature delamination was distinct in direction of the tower axis; while the temperature gradient was unconspicuous along the radial direction; and the fermenting liquid in the tower showed a very complicated movement including numerous small local circumfluences which seriously influenced temperature distribution. The establishment of such model was significant practically and theoretically in improving temperature control in late beer fermentation state.