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为了验证空气搅拌式种分槽流场数学模型的可靠性,设计了空气搅拌式种分槽的模型实验台架,实验台架按照原始比例进行缩小。采用有色示踪剂与KCl示踪剂来研究种分槽内的流体流动过程。在种分槽流场的数学模型中增加虚拟示踪剂模块,建立虚拟示踪剂跟踪计算的算法。对实验结果与数值计算结果进行了比较。结果表明:示踪剂进入种分槽后从翻料管流出的时间实验结果为40s,数值计算结果为42s;数值计算所得有色示踪剂在种分槽内的扩散过程与停留时间分布与实验结果吻合良好。实验结果表明:空气搅拌式种分槽的数学模型是可靠的,可以用于预测分析种分槽内流体流动状况。
In order to verify the reliability of the mathematical model of the flow field of the air-agitated seed tank, a model experimental bench of air-agitated seed tank was designed. The experimental bench was reduced according to the original ratio. The colored tracer and KCl tracer were used to study the fluid flow in the seed tank. The virtual tracer module is added to the mathematical model of the flow field in the seed sink and the algorithm of tracking and calculating the virtual tracer is established. The experimental results and numerical results were compared. The results show that the tracer outflow time from the flipper after entering the seed tank is 40s and the numerical calculation is 42s. The diffusion process and residence time distribution of the tracer in the seed tank are numerically calculated. The result is in good agreement. The experimental results show that the mathematical model of the air stirred seed tank is reliable and can be used to predict and analyze the fluid flow in the seed tank.