旋流自吸泵气液分离室结构对性能影响的预测

针对旋流自吸泵的气液分离室是影响泵性能的重要因素.应用FLUENT软件,选用标准k-ε模型和多重参考坐标系模型,对旋流自吸泵内部三维不可压缩湍流定常流场进行了数值模拟,得到了气液分离室内部流场分布情况,并对其分布规律进行了分析.建立了性能预测模型,对不同分离室高度下的模型进行了性能预测,并将预测结果进行了对比研究.结果显示：分离室对泵基本性能影响较大,在小流量区分离室高度对效率影响很小.为了得到最好的综合性能,对于某一方案,分离室的高度存在一个最佳值.最佳值的选取可以通过CFD进行性能预测,根据对比结果进行估算.

Numerical study on separation chamber of rotational flow in self-priming pump

The separation chamber of rotational flow in self-priming pump is an important factor for pump performance. The three-dimensional incompressible turbulent steady rotational flow in self-priming pump was simulated by using standard k - 8 model and multiple reference frame model in FLUENT. The interior flow field distribution in the gas-liquid separation chamber was obtained, and its distribution rule was analyzed. A performance forecast model was established, and models with different separation chamber heights were forecasted and contrasted. It was revealed that separation chamber heights have great influence on basic performance. However, its influence on efficiency was little. In order to get the best general performance, there is an optimal separation chamber height under a scheme. By comparing the performance forecast, the optimal value can be estimated.