FIELD: machine engineering.
SUBSTANCE: vane 20 for runner 18 of the Francis turbine having the throat diameter (Dth) has a maximum thickness of at least 0.03 of the throat diameter (Dth). The leading edge has a maximum angle of inclination of at least 45 degrees at its lower edge. The angle of inclination is determined by the vertical line and the leading edge.
EFFECT: group of inventions is aimed at the development of compact vanes having an improved performance in relation to the problems of cavitation and the efficiency of the turbine.
8 cl, 6 dwg
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| FRANCIS TURBINE RUNNER | 0 |
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| DOUBLE-FLOW RUNNER | 0 |
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