THERMAL SCIENCE

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Qiang Zhao

,

Yichao Yuan

FLOW AND HEAT TRANSFER CHARACTERISTICS OF HIGH-PRESSURE NATURAL GAS IN THE AIR GAP OF HIGH-SPEED MOTOR

ABSTRACT
High speed motors are widely used in industrial applications owing to their unique features, such as compact framework, high performance, and high reliability. Based on the finite volume method and numerical heat transfer theory, this study establishes a stator-air gap-rotor model, and the flow and heat transfer in the air gap between the stator and rotor in a high speed motor are investigated with high pressure natural gas as the cooling medium. Meanwhile, the “radial tri-vortex partition, alternating axial distribution” feature of the turbulent Taylor-Couette vortex in the air gap of the motor is determined. Then, the optimal structural parameters which can realize the heat transfer enhancement of motor air gap are obtained. Finally, an optical fiber grating temperature measurement system based on the wavelength division multiplexing technology is utilized to attain the temperature distributions on the stator and rotor surfaces. The simulation results are compared with the experimental data to evaluate the simulation method’s precision.
KEYWORDS
high-pressure natural gas, Turbulent Taylor vortex flow, high-speed motor, Heat Transfer Enhancement
PAPER SUBMITTED: 2023-06-03
PAPER REVISED: 2023-07-28
PAPER ACCEPTED: 2023-08-04
PUBLISHED ONLINE: 2023-10-08
DOI REFERENCE: https://doi.org/10.2298/TSCI230603206Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 2, PAGES [1767 - 1779]
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Flow and heat transfer characteristics of high-pressure natural gas in the air gap of high-speed motor

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence