Drag Reduction Through Employing Leading-Edge Tubercle on The Airfoil

DOI

10.2991/978-94-6463-602-4_16How to use a DOI?

Keywords

Drag reduction; Leading edge tubercle; airfoil; Reynolds number; angle of attack; Stall delay; Flow Separation control

Abstract

Drag reduction over the lifting surfaces has remained a key interest of aerodynamic researchers over the last five decades, due to rising fossil fuel prices, global warming and climate change. The drag over the lifting surfaces is closely related to the required thrust and consumption of fossil fuels thus overall emissions. In this connection, the present study aims to analyze the drag performance of leading-edge tubercle airfoil in pre- and post-stall regimes. For that purpose, two wing models, one with a smooth leading edge and the second with a tubercle leading edge were designed and simulated. The computational fluid dynamics CFD simulation was performed in a transitional flow regime. The wing model was developed by using the NACA0021 airfoil profile and simulated at chord-based Reynolds number of Rec=2.4×105. The numerical simulation results reveal that tubercles at the leading edge have a favorable effect on airfoil drag performance. It was found that at a lower angle of attack portion of viscous drag is very close to the pressure drag acting on the airfoil. However, at higher angles of attack contribution of viscous drag in total drag is reduced to about 5- 10%. It was also observed that at higher angles of attack viscous drag over tubercle leading edge airfoil is higher than the viscous drag of the baseline airfoil model, due to attached flow.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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.

Download article (PDF)

TY  - CONF
AU  - Intizar Ali
AU  - Tanweer Hussain
AU  - Ali Akbar Shah Syed
AU  - Danish Inam
AU  - Syed Muhammad Kashif Shah
AU  - Inam Ul Ahad
PY  - 2024
DA  - 2024/12/24
TI  - Drag Reduction Through Employing Leading-Edge Tubercle on The Airfoil
BT  - Proceedings of the 4th International Conference on Key Enabling Technologies (KEYTECH 2024)
PB  - Atlantis Press
SP  - 110
EP  - 115
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-602-4_16
DO  - 10.2991/978-94-6463-602-4_16
ID  - Ali2024
ER  -