论文部分内容阅读
选用标准κ-ε紊流模型,采用二阶精度及SIMPLE算法,设置相应边壁粗糙度,以Fluent流体计算软件为平台,以福建某电站为例对不同工况下出水侧流道流场进行了三维数值模拟计算,比较分析了岔管段优化前后不同工况下的速度分布、压强及紊动强度分布变化,获得水流流态变化规律与水力损失变化,并提出了优化效果明显的体型修改方案,有效减少了岔管段的水力损失,确保了电站运行效率。
The standard κ-ε turbulence model is adopted, and the second-order accuracy and SIMPLE algorithm are used to set the corresponding wall roughness. Using Fluent fluid calculation software as a platform and a hydropower station in Fujian as an example, The three-dimensional numerical simulation was carried out. The distribution of velocity, pressure and turbulence intensity under different operating conditions before and after bifurcated pipe sections were compared and analyzed. The changes of flow pattern and hydraulic loss were obtained, and the figure modification scheme with obvious optimization effect was proposed , Effectively reducing the hydraulic losses in the bifurcation section and ensuring the operation efficiency of the power station.