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

被引：6

作者：

Litvinov I.V. ^{[1
]}

Mitryakov A.S. ^{[1
]}

Shtork S.I. ^{[1
]}

机构：

[1] Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University, Novosibirsk

来源：

Power Technology and Engineering | 2016年 / 50卷 / 01期

关键词：

draft tube; hydraulic turbine; pressure pulsations; vortex rope;

D O I：

10.1007/s10749-016-0650-6

中图分类号：

学科分类号：

摘要：

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. © 2016, Springer Science+Business Media New York.

引用

页码：1 / 5

页数：4

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