摘要
通过对九级能量回收水力透平的全流道三维定常湍流计算,确定能量回收水力透平水力模型的设计方案.计算以连续性方程、雷诺时均N-S方程作为其控制方程,采用标准k-ε双方程湍流模型使方程组封闭.流速、压力的求解采用SIMPLE算法实现,离散采用具有二阶精度的隐式格式差分.计算结果详细地显示出透平内全流道的流速和压力分布,验证了设计方法的科学性.
Through numerical calculation of three-dimensional stationary turbulent flow in entire flow channel of nine-stage energy recovery turbine（ERT）,its hydraulic model design scheme was determined.Calculation took the continuity equation and Reynolds time-averaged N-S equation as its control equations.Turbulent model with standard k-ε double equation was used to make equations closed.Velocity and pressure were found out with SIMPLE scheme,variables discretization was implemented with implicit difference format of second-order accuracy.The result of calculation exhibited the velocity and pressure distribution in detail,so that the design method was verified is scientific.
出处
《兰州理工大学学报》
CAS
北大核心
2011年第4期56-60,共5页
Journal of Lanzhou University of Technology
关键词
能量回收
透平
三维
全流道
湍流
数值计算
energy recovery
turbine
three-dimension
entire flow channel
turbulent flow
numerical calculation
