دانلود رایگان مقاله انگلیسی تحلیل سیستم تهویه روتر ماشین خنک کننده از طریق دینامیک سیالات محاسباتی - اشپرینگر 2017

Abstract.

This paper describes design changes on rotor ventilation system of the air-cooled synchronous machine. There are several variants for the analysis. This research is performed to find possible ways for increase of the power output of the machine. The rotor cooling system uses an under winding cooling channel to distribute the cooling air in the axial direction into the rotor and then through the radial rotor channels into the air gap. The presented optimization of the rotor cooling system is in the angle pitch of the radial channels. These changes had to be verified, before it could be implemented to the actual machine. Computational Fluid Dynamics tool Ansys Fluent is used for the simulations. The changes have positive effect on pressure drop, airflow and air temperature.

4 Conclusion

There are three geometry options prepared for the analyses; each option with different angle of the radial ducts. Based on presented results, the option A seems to be best choice for realization because of its lowest pressure drop. There will have to be some additional testing of geometry option A, particularly the influence of the mentioned overlaps, which is neglected during first analyses. The test samples will have to be produced and of course the technological process will have to be specified.