A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model

I. V. Litvinov; A. S. Mitryakov; S. I. Shtork

doi:https://doi.org/10.1007/s10749-016-0650-6

A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model

I. V. Litvinov, A. S. Mitryakov, S. I. Shtork

Research output: Contribution to specialist publication › Article

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.

Original language	English
Volume	50
No	1
Specialist publication	Power Technology and Engineering
DOIs	https://doi.org/10.1007/s10749-016-0650-6
State	Published - 1 May 2016
Externally published	Yes

Keywords

draft tube
hydraulic turbine
pressure pulsations
vortex rope

All Science Journal Classification (ASJC) codes

Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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https://doi.org/10.1007/s10749-016-0650-6

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title = "A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model",

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 = "draft tube, hydraulic turbine, pressure pulsations, vortex rope",

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doi = "https://doi.org/10.1007/s10749-016-0650-6",

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T1 - A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model

AU - Litvinov, I. V.

AU - Mitryakov, A. S.

AU - Shtork, S. I.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - 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.

AB - 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.

KW - draft tube

KW - hydraulic turbine

KW - pressure pulsations

KW - vortex rope

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DO - https://doi.org/10.1007/s10749-016-0650-6

M3 - مقالة

SN - 1570-145X

VL - 50

JO - Power Technology and Engineering

JF - Power Technology and Engineering

ER -

A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model

Abstract

Keywords

All Science Journal Classification (ASJC) codes

UN SDGs

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