喷射泵内部流动数值分析

Numerical Analysis On Flows in Jet Pumps

利用贴体坐标变换技术、混合有限分析法和k-ε紊流模型,对沸水反应堆喷射泵内部流动进行了数值计算和流动分析。预测了壁面压强和轴心速度分布,并与实验数据进行比较,计算值与试验值吻合很好。流动分析结果显示:对于给定喉管面积与喷嘴面积比的喷射泵,射流核长度以及是否出现回流只与流量比有关。

Numerical calculation and a more detailed flow analysis are presented, based on the body-fitted coordinate system, hybrid finite analytical method and k-Ε turbulence model that are applied to predict the flows in jet pump for boiling water reactor. Predictions have been made and compared with experimental data pertaining to the centerline velocity decay and wall static-state pressure variation. The theoretical predictions compare well with the experimental data. The flow analysis results show that the jet potential core length and the appearance of the re-circulation in jet pump flows depend strongly on the flow ratio.