Simulación Numérica del Efecto de Bloqueo (Stall) en la Ventilación de un Generador-Motor

Abstract

In this work are presented the studies perfOrmed to evaluate the behavior of the cooling airflow in the radial stator duets of one generator-motor. Due to the rotor influence in the speed tangential component it can be produced the Stall phenomena,
what may generate the air circulation blocking at the entrance of the stator core radial ducts impairing the machine ventilation. These studies were made during the engineering studies aiming to discard the possibility of the Stall and to look for the optimum geometrical relationships to decrease the pressure drop in the stator entrance ducts.
In this particular case, the generator has a very large tangential component. This brought the necessity of the numerical simulation of this phenomenon, to let us to make a prediction of the ventilation behavior in the studied zone. In this work it was analyzed the central part of the generator components both together stator and rotor.