Numerical Simulation Of Rotating Thermal Flow Field Of Air-cooling Turbo-generator

With the increasing demand for electricity,capacity of air-cooling turbogenerator is promoted to the large,air-cooled turbo-generator attracts more and more people of all ages as a simple structure,easy to start and running.Turbine capacity increases result increase in heat,the heat load increases correspondingly and lead to higher temperature in motor parts,and this directly affects the motor's life and security.About the research of the motor,the studies of previous including stator and rotor,the air-gap have little research,especially on the rotating flow field is the first case.However,the air-gap which lay in the junction of stator and rotor have rotating and non-rotating flow-field,and flow field of the air-gap is very complex,So the flow field and temperature field of turbine is the primary task.This dissertation took an example of a large air-cooled turbine generator of Harbin Electrical Machinery,the temperature field of retaining ring and rototing flow field of gap has been studied using the FLUENT software and finite volume method,get the useful data that can guide practice.First,stator and rotor's twodimensional rotor model was created,then analysis the flow field and pressure field,especially the air-gap flow field,which including the velocity of fluid in gap and the movement trajectory of the fluid,these study laying the foundation for the three-dimensional rotating flow of air-gap.Secondly,create the complete three-dimensional model of No.8 slot,focusing on the three-dimensional air-gap rotating flow field,then get the mechanism of rotating fluid in air gap and the result of the interaction of various sports.Finally,create the Axle section and complete three-dimensional physical model of No.8 slot with the longest end of the air path,including the rotor and retaining.Then the temperature field was calculated and gets the temperature distribution of retaining ring that guides the intensity calculations of retaining ring.In this paper,the calculation is completed with the experimental data of manufacturers,and proves that the error within the permissible error range of the experiment,thus proving the correctness of this simulation,which provide useful data for the experimental study and actual production.