Construction of a reduced-order dynamic model for prospective swirling flow control in hydraulic turbine draft tube

被引：1

作者：

Rudolf, Pavel ^{[1
]}

Urban, Ondrej ^{[1
]}

Stefan, David ^{[1
]}

机构：

[1] Brno Univ Technol, Fac Mech Engn, V Kaplan Dept Fluid Engn, Tech 2896-2, Brno 61669, Czech Republic

来源：

29TH IAHR SYMPOSIUM ON HYDRAULIC MACHINERY AND SYSTEMS | 2019年 / 240卷

关键词：

D O I：

10.1088/1755-1315/240/2/022065

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Vortex rope in Francis turbine draft tubes poses serious problems. Emphasis on operation of the turbines in wide operating range, quite far from the design point, is a challenge for both the turbine designers and power plant owners. While flow control becomes popular in aircraft and automotive industry, it is still feared in turbomachinery. Present paper brings results of investigations aimed on construction of a reduced order model, which describes dynamics of the swirling flow in the draft tube. First step is assesing the dominant modes of the flow, second step is projection of those modes onto a transport equation. Final set of ordinary differential equations is a relatively simple model of the time evolution of the flow dynamics, which is basis for the flow control aiming on mitigation of the instabilities (e.g. vortex rope).

引用

页数：9

共 17 条

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