PROBLEM TO BE SOLVED: To attain excellent power recovery efficiency in a rotor blade driven by a two-phase flow containing a liquid phase component, using a simple configuration.;SOLUTION: A two-phase flow turbine is provided on a hub connected to a rotational shaft, and is driven by receiving a two-phase flow containing a liquid phase component and a gas phase component. A rotor blade comprises a rotor blade body fixed to the hub and having a pressure surface that receives the two-phase flow, and at least one groove provided on the pressure surface and extending so as to intersect the radial direction of the rotational shaft.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2020,JPO&INPIT
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