This two-phase flow turbine nozzle is provided to a two-phase flow turbine driven by means of a gas-liquid two-phase flow of a fluid, and is provided with a plurality of stator blades that are arranged in the circumferential direction so as to form a flow path therebetween, wherein the outlet opening of the flow path has a shape in which the width in the radial direction is larger than that in the circumferential direction.
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