混砂车搅拌罐试验模型相似设计及数值模拟

以混砂车搅拌罐为研究对象,为了将试验搅拌罐的混合效果在混砂车搅拌罐中重现,以搅拌罐单位体积的搅拌功率作为放大准则,用几何相似的原则分别建立了结构尺寸为1∶1和1∶4的搅拌模型。为了尽可能地接近混砂车的实际工况,模拟中采用了连续输砂搅拌的方式,使罐内混合液达到一个边混合边排出的过程。利用Fluent软件分析对比,得到了在相同的混合效果前提下,试验搅拌罐与混砂车搅拌罐的转速关系式,使试验结果能够较好地转化到混砂车搅拌罐上。

Similarity design and numerical simulation of test model of mixing tank in fracturing blender truck

The object of this study is the mixing tank of fracturing blender truck.In order to reflect the mixing effect of test stir-ring tank in real stirring tank,the mixing power in a unit volume is treated as the scale-up criteria,and the mixing model is estab-lished by the principle of geometric similarity.The structural size of the mixing system in 1：1 and 1：4 cases is discussed by using flow field analysis software FLUENT.In order to be as close as possible to the actual conditions,we used continuous sediment mixing to make the mixture reach a discharge process while mixing.As a result,the speed relationship between the test mixing tank and the fracturing blender truck mixing tank is established,which makes the test results be better applied to fracturing blender truck stirring tank.