Bibliographic Details
| Title: |
Unsteady Thin-Airfoil Theory Revisited: Application of a Simple Lift Formula. |
| Authors: |
Tianshu Liu1 tianshu.liu@wmich.edu, Shizhao Wang2, Xing Zhang3, Guowei He4 |
| Source: |
AIAA Journal. Jun2015, Vol. 53 Issue 6, p1492-1502. 11p. |
| Subjects: |
Aerofoils, Airplane design, Viscous flow, Fluid flow, Reynolds number, Computer simulation |
| Abstract: |
The physical foundations of unsteady thin-airfoil theory are explored in the general framework of viscous flows. The thin-airfoil lift formula is derived by using the simple lift formula that contains the vortex lift and the lift associated with the fluid acceleration. From a broader perspective, the thin-airfoil lift formula could be applicable even when the flow around an airfoil is moderately separated, from which the classical von Karman-Sears lift formula can be recovered as a reduced case. The quantitative relationship between boundary layer and lift generation is discussed. Direct numerical simulations of low-Reynolds-number flows over a flapping flat-plate airfoil are conducted to examine the accuracy and limitations of the thin-airfoil lift formula. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
