Mathematical, numerical and experimental analysis of the swirling flow at a Kaplan runner outlet
Paper i proceeding, 2012

The paper presents a novel mathematical model for a-priori computation of the swirling flow at Kaplan runners outlet. The model is an extension of the initial version developed by Susan-Resiga et al [1], to include the contributions of non-negligible radial velocity and of the variable rothalpy. Simple analytical expressions are derived for these additional data from three-dimensional numerical simulations of the Kaplan turbine. The final results, i.e. velocity components profiles, are validated against experimental data at two operating points, with the same Kaplan runner blades opening, but variable discharge.


Sebastian Muntean

Academia Romana

Tiberiu Ciocan

Universitatea Politehnica din Timisoara

Romeo Susan-Resiga

Universitatea Politehnica din Timisoara

Michel Cervantes

Luleå tekniska universitet

Håkan Nilsson

Chalmers, Tillämpad mekanik, Strömningslära

IOP Conference Series: Earth and Environmental Science

17551307 (ISSN) 17551315 (eISSN)

Vol. 15 Part 3 Art. no. 032001- 032001




C3SE (Chalmers Centre for Computational Science and Engineering)


Strömningsmekanik och akustik



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