journal article·2018-04-01Open access

An empirically-based model for the lift coefficients of twisted airfoils with leading-edge tubercles

Zao Ni, Tsung-chow Su, Manhar Dhanak

AIP Advances· Volume 8· Issue 4

Abstract

Experimental data for untwisted airfoils are utilized to propose a model for predicting the lift coefficients of twisted airfoils with leading-edge tubercles. The effectiveness of the empirical model is verified through comparison with results of a corresponding computational fluid-dynamic (CFD) study. The CFD study is carried out for both twisted and untwisted airfoils with tubercles, the latter shown to compare well with available experimental data. Lift coefficients of twisted airfoils predicted from the proposed empirically-based model match well with the corresponding coefficients determined using the verified CFD study. Flow details obtained from the latter provide better insight into the underlying mechanism and behavior at stall of twisted airfoils with leading edge tubercles.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Fluid Dynamics and Turbulent Flows · Fluid Dynamics and Vibration Analysis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Florida Atlantic University , Boca Raton, Florida 33431, USA

References (32)

Show source-provided references
1. Hydrodynamic flow control in marine mammals10.1093/icb/icn029 ↗
2. The tubercles on humpback whales’ flippers: Application of bio-inspired technology10.1093/icb/icr016 ↗
3. Leading-edge tubercles delay stall on humpback whale flippers10.1063/1.1688341 ↗
4. Effects of leading-edge tubercles on a representative whale flipper model at various sweep angles
5. Effect of leading-edge protuberances on aerofoil performance10.2514/1.28497 ↗
6. Performance variations of leading-edge tubercles for distinct airfoil profiles10.2514/1.j050631 ↗
7. Experiment study of flow separation control on a low Re aerofoil using leading-edge protuberance method10.1007/s00348-014-1710-z ↗
8. Aerodynamic control of low-Reynolds-number airfoil with leading-edge protuberances10.2514/1.j052319 ↗
9. Numerical study of stall delay on humpback whale flippers
10. Computational evaluation of the performance of lifting surfaces with leading-edge protuberances10.2514/1.c031163 ↗
11. Computation of flow field around an airfoil with leading-edge protuberances10.2514/1.c031675 ↗
12. Numerical evaluations of the effect of leading-edge protuberances on the static and dynamic stall characteristics of an airfoil10.1088/1757-899x/52/5/052006 ↗
13. Numerical investigation of passive separation control for an airfoil at low-Reynolds number conditions10.2514/1.j051553 ↗
14. The formation mechanism and impact of streamwise vortices on NACA 0021 airfoil’s performance with undulating leading edge modification10.1063/1.4896748 ↗
15. Numerical investigations of hydrodynamic performance of hydrofoils with leading-edge protuberances10.1177/1687814015592088 ↗
16. How bumps on whale flippers delay stall: An aerodynamic model10.1103/physrevlett.100.054502 ↗
17. 1991
18. The effect of undulating leading-edge modifications on NACA 0021 airfoil characteristics10.1063/1.4828703 ↗
19. Low-Reynolds-number airfoils10.1146/annurev.fl.15.010183.001255 ↗
20. 2007
21. 2013
22. 2008
23. 1989
24. 2011
25. 1992
26. 1998
27. 2001
28. Solution of the lifting line equation for twisted elliptic wings10.2514/3.44308 ↗
29. 2015
30. ANSYS · 2016
31. 1989
32. On the birth of stall cells on airfoils10.1007/s00162-010-0193-7 ↗