Measuring the heat transfer coefficient in a direct oil-cooled electrical machine using thin film heat flux gauges

Conference item

This paper presents the measurement of the heat transfer coefficient (HTC) in an oil-cooled electrical machine with a segmented stator using double layered heat flux gauges. While heat flux gauges have been used for HTC measurements in applied to aerospace components such a gas turbine blades, to the authors knowledge the technique has never been applied to directly oil-cooled electrical machines. Therefore the paper explores the challenges linked with this technique when applied to this setting. The paper develops a correlation for the HTC on the sides of the pole pieces and compares the non-dimensional Nusselt number with existing correlations for laminar flow in pipes.

Authors: Camilleri, R; Beard, PF; Howey, D; McCulloch, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: UK Heat Transfer Committee
• Host title: Proceedings of the 14th UK Heat Transfer Conference & ThermaPOWER Meetings
• Article number: AP34
• Publication date: 2015-09-07
• Acceptance date: 2015-09-07
• Event title: 14th UK Heat Transfer Conference & ThermaPOWER Meetings
• Event location: Edinburgh, Scotland, UK
• Event website: https://www.ukht.eng.ed.ac.uk/home
• Event start date: 2015-09-07
• Event end date: 2015-09-08
• Language: English
• Keywords: SBTMR