Hydraulic Design and Numerical Simulation of Quasi Tubular Turbine
Aiming at a project with large head change and small ecological flow,a variable speed quasi tubular turbine suitable for low head was designed by applying the design theory of fluid machinery and computational fluid dynamics(CFD)numerical simulation calculation method.The RNG κ-ε Turbulence model was used to conduct three-dimensional steady numerical simulation of full flow passage of hydraulic turbine.The pressure,velocity,and velocity vector changes of each component flow field were obtained.It was found that the internal flow pattern was good,the hydraulic loss was small,and the unit efficiency reached 94.71％,which met the design requirements.By using variable speed operation,it can adapt to a wide range of water head changes and maintain high efficiency even when operating outside the design con-ditions,which has high engineering application value.
quasi tubular turbinestructural designvariable speednumerical simulation
NETL
NSTL
万方数据
维普
