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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

AN APPROXIMATION METHOD FOR HEAT TRANSFER PREDICTION IN A MAGNETIC SUSPENSION MACHINE

Get access (open in a dialog) DOI: 10.1615/IHTC16.ctm.023422
pages 3973-3980

Abstract

As an effective way for eliminating the friction between moving parts and still rail, the magnetic suspension technology has been widely used in transport machine. Due to heat generated by the electromagnetic coil, the heat transfer performance is an important factor to be considered in the system design. Instead of fluid-solid coupling simulation, in present study, a 3D unsteady approximation method is developed to balance the engineering accuracy and computational consumption. In our simplified method, the fluid flow is omitted and the convection heat transfer between air and solid is considered using a formula at wall boundary condition. To further reduce the computational consumption, the radiative heat transfer between the faces of moving parts and still rail is also simplified by using a modified boundary condition which contains instantaneous external radiation temperature and external emissivity. It is found that the results of our approximation method agree well with the experimental data. Meanwhile, the calculation time reduces to less than 0.08% of the traditional method. Based on this method, the influence of the movement state of moving parts on temperature distribution of the magnetic suspension machine is investigated.