Research on Taylor Vortices in the Wedge-Shaped Air Gap of Evaporation Cooling Turbo Generator

Abstract

Cooling technique is one of the most important parts to improve the development of turbo generator. Turbo generator with evaporative cooling stator and water cooling rotor possesses many excellent qualities for mid unit. In this system the stator bars and core are immerged in evaporative coolant, which could be cooled fully. The rotor bars are cooled by water inner cooling mode. In this paper, we describe the Taylor Vortices in the Wedge-shaped air gap of Evaporation cooling Turbo Generator and present the research on gas-flow and heat-transfer with different features in the turbo generator. The CFD method is used to analyze this system, which has different features, including gap size, rotating speed, Apex angle. And the heat-transfer calculation proves the axial direction gas-flow can do well to the rotator heat-emitting.