Study of three types of wave leading edge on the performance of industrial turbine blade cascade
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 13 November 2020
Issue publication date: 16 February 2021
Abstract
Purpose
The blade profile and its geometrical features play an important role in the separation of the boundary layer on the blade. Modifying the blade geometry, which might lead to the delay or elimination of the flow separation, can be considered as a passive flow control methodology. This study aims to find a novel and inexpensive way to reduce loss with appropriate modifications on the leading edge of the turbine blade.
Design/methodology/approach
Three types of wave leading edges were designed with different wavelengths and amplitudes. The selected numbers for the wave characteristics were based on the best results of previous studies. Models with appropriate and independent meshing have been simulated and studied by a commercial software. The distribution of the loss at different planes and mid-plane velocity vectors were shown. The mass flow average of loss at different incidence angles was calculated for the reference blade and modified ones for the sake of comparison.
Findings
The results show that in all three types of modified blades compared to the reference blade, the elimination of flow separation is observed and therefore the reduction of loss at the critical incidence angle of I = –15°. As the amplitude of the wave increased, the amount of loss growing up, while the increase in wavelength caused the loss to decrease.
Originality/value
The results of the present numerical analysis were validated by the laboratory results of the reference blade. The experimental study of modified blades can be used to quantify numerical solutions.
Keywords
Acknowledgements
Corrigendum: It has come to the attention of the publisher that the article Ghandi, H., Aghaei Togh, R. and Mesgarpoor Tousi, A. (2020), “Study of three types of wave leading edge on the performance of industrial turbine blade cascade”, Aircraft Engineering and Aerospace Technology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/AEAT-06-2020-0115 includes incorrect affiliation details for Mr. Hamed Ghandi and Assistant Prof. Reza Aghaei Togh. This error was introduced in the editorial process and has now been corrected in the online version. The publisher sincerely apologises for this error and for any inconvenience caused.
Citation
Ghandi, H., Aghaei Togh, R. and Mesgarpoor Tousi, A. (2021), "Study of three types of wave leading edge on the performance of industrial turbine blade cascade", Aircraft Engineering and Aerospace Technology, Vol. 93 No. 1, pp. 105-114. https://doi.org/10.1108/AEAT-06-2020-0115
Publisher
:Emerald Publishing Limited
Copyright © 2020, Emerald Publishing Limited