As a special design, the working on the type of turbine Francis centripetal (see Figure 3.30) are considered. In contrast to the water turbine, where spatially curved blades are used, the blade airfoil with regard to the high centrifugal stresses essentially have to be formed of radially projecting elements here. The centripetal reached at a simple design and small dimensions significant efficiencies and is therefore used for small gas turbines and turbochargers with success.
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