Research Article | OPEN ACCESS
Temperature Field Study on the of Natural Convection and Its Effect on the Critical Speeds in a High Pressure Rotor System
1X.Z. Zhu, 1C.Y. Sun, 2H.Q. Yuan and 1Y.D. He
1School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China
2College of Sciences, Northeastern University, Shengyang 110004, China
Research Journal of Applied Sciences, Engineering and Technology 2014 11:2175-2181
Received: October 22, 2012 | Accepted: December 20, 2012 | Published: March 20, 2014
Abstract
The coupling fluid flow-thermal model of natural convection heat in a High-Pressure Rotor (HPR) of the aero engine was established with Computational Fluid Dynamics (CFD) method. The temperature distributions and flow fields of the HPR with different shutdown time were studied. Then, the temperature distributions of the HPR during the hot start-up with different shutdown time were calculated. Moreover, the effects of hot start-up and shutdown temperature fields on the critical speeds of the HPR were carried out. The results show that the flow rule in the cavity of HPR is different from that in a quadrate cavity and presents diversity and complexity of flow. During 40-90 min of shutdown time, the temperature difference of the HPR is more than 20°C. When the shutdown time reaches to 60 min, the first critical speed of the HPR is decreased by 22.3% from 2256 to 1768 rpm.
Keywords:
Aero-engine, CFD, High-Pressure Rotor (HPR), hot startup process, natural convection heat, thermal vibration,
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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