Development and design study of the flow part of the pump turbine for the conditions of the Kaniv PSPP

Представлены результаты разработки проточной части радиально-осевой насос-турбины повышенной быстроходности на напор до 120 м для условий Каневской ГАЭС. С помощью программного комплекса IPMFlow выполнено численное исследование пространственного вязкого течения жидкости в решетках направляющего аппарата и рабочего колеса в турбинном режиме работы. Проведен анализ структуры потока и потерь энергии в этих элементах проточной части при четырех значениях расхода.The results of the development of a flow part of radial-axial pump-turbine of high specific speed at head up to 120 m for the conditions of the Kanevskaya PSPP are presented. Profiling of the runner blade by method of solving the differential equation of the current streamlet in the plan has been carried out. A numerical study of the spatial viscous fluid flow in the computational domain including guide vanes and a runner in a turbine operating mode using the software program IPMflow has been performed. The fluid flow simulation on basis of numerical integration of the Reynolds equations with an additional term containing artificial compressibility has been implemented. The differential two-parameter model of Menter (SST) has been applied to take into account turbulent effects. Numerical integration of the equations is carried out using an implicit quasi-monotone Godunov type scheme of second - order accuracy in space and time. The flow pattern and energy losses in these elements of flow part at four values of discharge has been analyzed