An experimental study of rotational pressure loss in rotor- stator gap

Yew Chuan Chong, David Staton, Markus Mueller, John Chick

Research output: Contribution to conferencePaperpeer-review

Abstract

The annular gap between rotor and stator is an inevitable flow path of a throughflow ventilated electrical machine, but the flow entering the rotor-stator gap is subjected to the effects of rotation. The pressure loss and volumetric flow rate across the rotor-stator gap were measured and compared between rotating and stationary conditions. The experimental measurements found that the flow entering the rotor-stator gap is affected by an additional pressure loss. In the present study, the rotational pressure loss at the entrance of rotor-stator gap is characterised. Based upon dimensional analysis, the coefficient of entrance loss can be correlated with a dimensionless parameter, i.e. rotation ratio. The investigation leads to an original correlation for the entrance loss coefficient of rotor-stator gap arisen from the Coriolis and centrifugal effects in rotating reference frame.
Original languageEnglish
Number of pages16
Publication statusPublished - Jun 2016
EventInternational Heat Transfer Symposium - Nottingham, United Kingdom
Duration: 26 Jun 201629 Jun 2016

Conference

ConferenceInternational Heat Transfer Symposium
CountryUnited Kingdom
CityNottingham
Period26/06/1629/06/16

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