Sources of windage power loss in salient poles hydrogenerator

Majer, Siniša and Tuković, Željko (2017) Sources of windage power loss in salient poles hydrogenerator. = Sources of windage power loss in salient poles hydrogenerator. In: 7th International Conference & Workshop REMOO-2017, Venice, Italy, 10-12.05.2017., Venecija, Italija.

Full text not available from this repository.
Official URL:


Due to the fact that hydro-generators are primarily electrical machines, traditionally insufficient attention is paid to aerodynamics within the machine. Consequently, the existing analytical methods for windage loss calculations, which in the hydro-generator can participate with more than 30% of total losses, are quite simplified and are based largely on empirical data for each specific design. This paper presents the results of stationary, 3D numerical calculations of salient-poles hydro-generator windage loss, carried out with commercial CFD tool. The model was validated against relevant published experimental results for protruded rotor-stator cavities, and then similar approach was used to simulate air flow through model of hydro-generator. Calculation results of hydro-generator model were compared with the results of the on-site calorimetry measurements. The simulations were performed with k-ω SST turbulence model and the rotor motion is modeled by “multiple reference frame” approach. Validation of CFD model on protruded rotor-stator model showed good agreement with measurements: departure of calculated windage loss are lower than 8.5% of the measured. Comparison of the calculated results with the on-site calorimetry measurements showed greater departure: 14.8%. Numerical calculations enabled insight into the windage loss contribution of each main structural element: salient poles, axial fan and various protrusions and reinforcements. Conducted calculations represent contribution to understanding of the origin of windage loss in salient poles hydro-generators. Further research is needed to clarify and reveal the details of complex interactions between different construction elements and their influence on windage loss of salient-poles hydro-generators.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): CFD ; hydro-generator ; salient poles ; windage power loss
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 30 Aug 2017 11:46
Last Modified: 30 Aug 2017 11:46

Actions (login required)

View Item View Item

Nema podataka za dohvacanje citata