A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model
- Authors: Litvinov I.V.1, Mitryakov A.S.1, Shtork S.I.1
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Affiliations:
- Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
- Issue: Vol 50, No 1 (2016)
- Pages: 1-5
- Section: Hydrotechnical Construction
- URL: https://journal-vniispk.ru/1570-145X/article/view/245036
- DOI: https://doi.org/10.1007/s10749-016-0650-6
- ID: 245036
Cite item
Abstract
Results are presented of experiments carried out using an air model of a hydraulic turbine draft tube. These included velocity measurements in the conical part of the tube using a laser-Doppler anemometer and measurement of pressure pulsations using acoustic sensors (microphones). It is shown that a system of two runner vane cascades can be used to simulate a velocity distribution that resembles the distributions downstream of a runner under full-scale conditions. Experiments show that modes involving the formation of a vortex rope occur in the region of significant hydroelectric generating unit underload. Analysis of spectra, the cross-correlation function, and mean velocity distributions confirmed the vortex nature of the generation of powerful pressure pulsations in the draft tube cone.
Keywords
About the authors
I. V. Litvinov
Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
Author for correspondence.
Email: litvinov@itp.nsc.ru
Russian Federation, Novosibirsk
A. S. Mitryakov
Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
Email: litvinov@itp.nsc.ru
Russian Federation, Novosibirsk
S. I. Shtork
Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
Email: litvinov@itp.nsc.ru
Russian Federation, Novosibirsk
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