Automation of the design of the impeller of a radial-axial hydraulic turbine

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The article describes approaches to the design of a vane system of radial-axial hydraulic turbines based on an automated design system developed at SPbPU using the Python programming language. The specified system currently includes the following modules: selection of the main parameters of the hydraulic turbine, construction of the meridional projection of the impeller, calculation of the potential flow and construction of the blade system of the radial-axial hydraulic turbine. The choice of the main parameters of the hydraulic turbine is based on the technique generally accepted in hydraulic turbine engineering, which has been digitized and introduced into the software package. The paper considers and analyzes different approaches to the design of the meridional bypasses of the flow path in the area of the impeller of a radial-axial hydraulic turbine, a comparison of the results of their construction using different methods is given. A technique that is most suitable for algorithmization in the software package based on the results of the analysis was selected. The construction of streamlines and the calculation of velocities along them are presented on the basis of the calculation of the potential flow in the meridian section. The design of the blade system of the hydraulic turbine was carried out by the method of solving the direct axisymmetric problem of the theory of hydraulic machines. As an example, a blade system of a radial-axial hydraulic turbine was designed for a head up to 75 meters, the initial parameters of which correspond to hydraulic turbines-analogues of similar speed. The designed hydro turbine was calculated in Ansys, and the results confirmed its excellent energy properties. It is planned to further develop the software package in terms of automatic construction of 3-dimensional solid models of the flow path, which can later be calculated by the methods of computational fluid dynamics and optimized to obtain hydraulic turbines with parameters corresponding to the current state of the art.

作者简介

A. Zharkovskiy

Peter the Great St. Petersburg Polytechnic University

Email: tshur_va@spbstu.tu

DSc in Engineering

俄罗斯联邦, Saint Petersburg

V. Shchur

Peter the Great St. Petersburg Polytechnic University

编辑信件的主要联系方式.
Email: tshur_va@spbstu.tu

PhD in Engineering

俄罗斯联邦, Saint Petersburg

M. Omran

Peter the Great St. Petersburg Polytechnic University

Email: tshur_va@spbstu.tu
俄罗斯联邦, Saint Petersburg

A. Staseyev

Peter the Great St. Petersburg Polytechnic University

Email: tshur_va@spbstu.tu
俄罗斯联邦, Saint Petersburg

参考

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1. JATS XML
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2. Fig. 1. Selection of the type of turbine and its parameters (RA 75)

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3. Fig. 2. Screen for constructing the working area of a hydraulic turbine

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4. Fig. 3. Typical dimensions of the impeller radial-axial hydraulic turbine

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5. Fig. 4. Meridian contours of the HT impeller for different heads

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6. Fig. 5. Streamlines and meridional velocities in impeller of HT RO-75 (full-scale size)

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7. Fig. 6. Impeller blade of RO-75 hydraulic turbine in plan

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8. Fig. 7. Results of design of RO-75 according to CAD of impeller of HT

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版权所有 © Zharkovskiy A.A., Shchur V.A., Omran M., Staseyev A.A., 2021

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