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access icon openaccess Fluid flow measurement in rotor ventilation ducts

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 22/06/2018, Accepted 27/07/2018, Published 22/01/2019

Engineers are constantly developing different ways to cool electrical machines more efficiently. Ventilation ducts/channels are common in the stators of large electrical machines. Lately ventilation ducts on rotors of electrical machines are also being introduced. While measurement of fluid velocities inside stationary ventilation ducts, such as those present in and around the stator core of electrical machines, are relatively easy, measurement of fluid velocities inside rotating ventilation ducts, such as those present on the rotors of electrical machines, is quite challenging. This study describes a method which enables the measurement of fluid velocities inside rotating ducts on the rotor of electrical machines.

Inspec keywords: ventilation; pipe flow; flow measurement; ducts; turbogenerators; electric machines; rotors; stators; cooling

Other keywords: rotor ventilation ducts; cool electrical machines; fluid velocities; stationary ventilation ducts; fluid flow measurement; ventilation ducts/channels

Subjects: Heat and thermodynamic processes (mechanical engineering); Flows in ducts, channels, and conduits; Fluid mechanics and aerodynamics (mechanical engineering); a.c. machines; Applied fluid mechanics; General fluid dynamics theory, simulation and other computational methods; Other topics in statistics

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