Numerical simulation of swirling flow modes in a model of a hydraulic turbine and a draft tube

被引：3

作者：

Minakov, A. V. ^{[1
,2
]}

Platonov, D. V. ^{[1
,2
]}

Sentyabov, A. V. ^{[1
,2
]}

机构：

[1] SB RAS, Kutateladze Inst Thermophys, Novosibirsk, Russia

[2] Siberian Fed Univ, Krasnoyarsk, Russia

来源：

THERMOPHYSICS AND AEROMECHANICS | 2023年 / 30卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

pressure pulsations; Francis turbine; re-connection; modeling; hydroelectric power station; HYDRO-TURBINE; VORTEX; RECONNECTION;

D O I：

10.1134/S0869864323010055

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The influence of asymmetric boundary conditions on flow regimes in a model hydraulic turbine has been investigated. The curved draft tube is shown to have almost no effect on the vortex structure, preserving such a phenomenon as the re-connection of the vortex core. The axial and tangential velocity profiles also remain unchanged. There is a change in pressure pulsations, despite the similarity of the average values and the unsteady vortex flow pattern. In the case of an asymmetric model, the pressure pulsation is higher than for a symmetric model. This may indicate a superposition of pulsations, caused by the rotation of a precessing vortex core, with generated longitudinal (synchronous) pressure fluctuations.

引用

页码：37 / 42

页数：6

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