Approach to the Laboratory Modeling of the Flow Velocity Distribution behind a Hydro Turbine Runner. 1. Design of Swirlers Vanes
A. S. Ustimenko1, I. V. Litvinov2,3, V. I. Sonin1, S. I. Stork2, P. A. Kuibin2,3, A. V. Semenova1
1Power Machines company, St. Petersburg, Russia
2Kutateladze Institute of Thermophysics, Russian Academy of Sciences, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3Novosibirsk National Research State University, Novosibirsk, Russia
Keywords: modeling, design, hydro turbine
Abstract
Investigation of the flow behind a hydro turbine runner on a large-sized experimental rig consisting of a spiral chamber, stator columns, guide vanes, and a runner is difficult due to the high cost and labor intensity. This paper presents an approach to modeling the flow velocity distribution at the inlet to the draft tube of a hydro turbine, which can significantly reduce the cost of testing. In this approach, the flow at the inlet to the draft tube is modeled using a special swirl apparatus - a combination of two vane swirler: fixed and rotating. The results of an analytical calculation of the shape of the vanes for reproducing a specified velocity distribution corresponding to the optimal operation of the hydro turbine are given.
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