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针对方锥管布浆器内的流动特性,采用计算流体动力学方法,通过改变回流量大小对布浆器进行数值模拟与分析。实验发现:总管回流量偏小时,靠近进口端支管流量减小,而靠近回流端支管流量却增大,反之亦然;回流量为12.5%和7.5%时,布浆效果最好。支管流量最大值和最小值分布在总管回流端和进口端。依据模拟特性,本文对布浆器结构进行优化后,各支管流量与期望值(7.2 kg·s-1)偏差由3.87%缩小为2.54%,布浆均匀性提高;其靠近进口端的支管流量值与期望值的偏差比优化前提高了2%,靠近出口端的支管流量与期望值的偏差比优化前降低了1.23%。在理论上为布浆器的设计提供了可靠依据。
In view of the flow characteristics of the square pipe beater, CFD method is used to simulate and analyze the mortar by changing the amount of backflow. The experimental results show that when the total backflow is too small, the flow near the inlet decreases, while the flow near the return ends increases, and vice versa. When the backflow is 12.5% and 7.5%, the best effect is achieved. The maximum and minimum branch flow distribution in the manifold reflux and inlet. Based on the simulation results, the deviation of the flow rate from the expected value (7.2 kg · s-1) was reduced from 3.87% to 2.54% and the fabric uniformity was improved after the structure of the mortar was optimized in this paper. The branch flow rate close to the inlet The expected deviation is 2% higher than before optimization, and the deviation of the branch flow near the outlet from the expected value is 1.23% lower than before optimization. In theory, it provides a reliable basis for fabricator design.