Numerical analysis of hub cavity leakage
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 20 June 2019
Issue publication date: 21 August 2019
Abstract
Purpose
This paper aims to predict the effect of the hub cavity leakage on the overall performance with numerical simulations in the fan/booster of a high bypass ratio turbofan engine.
Design/methodology/approach
Simulations are conducted for leakage at the fan, the outlet of guide vane and the three-stage booster, as well as hub leakage (contain cavities and sealing). The results obtained are compared to the corresponding simulations without hub leakage.
Findings
The rotor/stator interaction locations are evaluated to discover a better location. The results show that the seal tooth structure produces secondary flow and turbulence in the root of blade suction surface, which increases the aerodynamic loss. The sealing clearance should be controlled to shrink the turbulent region and decrease the leakage.
Practical implications
This work can provide a theoretical guidance and technical support for the compressor design, which avoid many repeated manufactures and reduce waste of resources.
Originality/value
This work improves the understanding of the impact mechanism of hub cavity leakage on the performance when the clearance size of seal is variable.
Keywords
Citation
Xia, Y., Xie, Y., Li, D. and Wang, W. (2019), "Numerical analysis of hub cavity leakage", Aircraft Engineering and Aerospace Technology, Vol. 91 No. 8, pp. 1086-1092. https://doi.org/10.1108/AEAT-06-2018-0154
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited