The Research of the Thermal State of the Umbrella Type Hydrogenerator by САЕ Methods

Abstract

In submitted paper the research of the thermal state of the umbrella type Hydrogenerator rated 60 MW is considered. Heating and ventilation calculation was performed in a three-dimensional formulation using the Solid Works Flow Simulation. The possibility of determining of the boundary conditions of the 3-rd kind necessary for determining of the thermal-stressed state of and units of Hydrogenerators emerging in their constructive and active parts is shown. The criterion for the convergence of the proposed method was to determine the minimum allowable losses to ventilation while ensuring the required cooling air flow rate necessary for the Hydrogenerator cooling. At that, the temperature fields of the active parts of the generator are maintained uniform. The design feature of the ventilation system is specially profiled forced elements in the form of plates fastened on the rotor rim. The temperature of the active parts did not exceed the limit of acceptable values according to GOST 5615-89 for insulation class F .