Numerical and Experimental Investigations on Windage Heating Effect of Labyrinth Seals
Publication: Journal of Aerospace Engineering
Volume 33, Issue 5
Abstract
The heat load caused by windage heating effect of labyrinth seals seriously influences the sealing of shaft air flow. To reveal the windage heating effect of labyrinth seals to reasonably design an aeroengine rotor, this paper studies the windage heating characteristics of labyrinth seals from theoretical, numerical, and experimental perspectives. First, the theoretical analysis of the windage heating effect of labyrinth is conducted, and the experimental platform of heating labyrinth was established to test the heating labyrinth effect. Then, an turbulence model was adopted to investigate the characteristics of flow field, leakage characteristics, and windage heating characteristics of labyrinth seals. Last, the influences of pressure ratio, rotational speed and other factors on the windage heating characteristics of labyrinth seals were investigated by theoretical calculation, numerical simulation, and experiment. Through the comprehensive study, we find that: (1) windage heating is indeed induced when leakage flow absorbs the frictional heat caused by the rub of leakage flow with the rotor; (2) when the speed is lower than , the windage heating effect is small and enhances with the rise of rotation speed from , and the maximum increase of temperature reaches to 12.87 K; and (3) the pressure ratio increases from to , and the temperature rise decreases by . The results of this paper offer a useful insight for the design of labyrinth seals with the emphasis on windage beating effect, to improve the performance of rotor seals.
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Data Availability Statement
The data used to support the findings of this study are included within the article.
Acknowledgments
This study is cosupported by the National Natural Science Foundation of China (Grant Nos. 51675351 and 51975124), China’s Postdoctoral Science Funding (Grant No. 2018M633572) and Innovative Talents Support Program of Liaoning Province for the institutions of higher education (Grant No. LR2016033). All authors thank them.
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Published In
Journal of Aerospace Engineering
Volume 33 • Issue 5 • September 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Dec 30, 2019
Accepted: Apr 23, 2020
Published online: Jun 26, 2020
Published in print: Sep 1, 2020
Discussion open until: Nov 26, 2020
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