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Lookup NU author(s): Dr Yaodong WangORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
This paper investigates the heat transfer characteristics of the external ventilated path of a compact, 6 kV,4-pole, 2500 kW motor using flow-thermal coordination mechanism. A computational model is set upand validated by experimental test results. A series of simulation is performed. It is found that the deflectionangle a and outlet angle b of the fan blades are the key parameters affecting the efficiency of thecooling effect of the fan. Optimal measures are adopted by changing the deflection angle and outlet angleof fan blades. External fan efficiency is improved from 28.80% to 29.96% and outlet flow is increased by0.08 m3/s by optimizing the deflection angle a and outlet angle b. According to the optimization results ofexternal fan, heat transfer characteristics and temperature distribution of the cooler is obtained by thefluid and temperature coupling field. The cooler is optimized by adjusting the height of the windshield,increasing the number of the windshield, changing the shape of inclined plate. It is found that the temperatureof hyperthermal fluid of inner ventilated path is decreased from 75 C to 53.7 C; at the sametime the temperature of cryogenic fluid of external ventilated path is increased from 23 C to 49.4 C.The outlet temperature of internal fluid of post-optimized cooler is dropped by 3 C, and the external fluidtemperature is increased by 2.5 C. The performance of fan and the cooling effect is improved. The resultsfrom this study can provide an effective method for structural optimal design of compact high-voltagemotors.
Author(s): Xu YM, Jia YJ, Ai MM, Wang YD
Publication type: Article
Publication status: Published
Journal: International Journal of Heat and Mass Transfer
Year: 2018
Volume: 124
Pages: 1136–1146
Print publication date: 08/04/2018
Online publication date: 24/04/2018
Acceptance date: 08/04/2018
Date deposited: 25/04/2018
ISSN (print): 0017-9310
ISSN (electronic): 1879-2189
Publisher: Elsevier
URL: https://doi.org/10.1016/j.ijheatmasstransfer.2018.04.034
DOI: 10.1016/j.ijheatmasstransfer.2018.04.034
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