What is the leading edge vortex?
Recent study has shown that the leading edge vortex increases lift force and delays the stall angle. It is observed over the upper side of the fixed wings such as delta wings of flight fighter and the flapping wings such as insects and humming birds. (read more in Literature Review)
Recent study has shown that the leading edge vortex increases lift force and delays the stall angle. It is observed over the upper side of the fixed wings such as delta wings of flight fighter and the flapping wings such as insects and humming birds. (read more in Literature Review)
What are we going to do in this project about the leading edge vortex?
This project aims to have an insight into this fluid feature and investigate its effect by computational fluid dynamics (CFD) simulations using the software Star-CCM+.
Three aerofoils (NACA 0012 aerofoil, flat plate and curved plate) at the angle of attack 2°-7° have been studied under the 2-dimensional laminar flow at Reynolds number 4,000. Lift and drag coefficients and the wall shear stress coefficients are plotted. The velocity vector fields and the vorticity fields are made in scenes for visualisation. (read more in Experiment and CFD Methods)
This project aims to have an insight into this fluid feature and investigate its effect by computational fluid dynamics (CFD) simulations using the software Star-CCM+.
Three aerofoils (NACA 0012 aerofoil, flat plate and curved plate) at the angle of attack 2°-7° have been studied under the 2-dimensional laminar flow at Reynolds number 4,000. Lift and drag coefficients and the wall shear stress coefficients are plotted. The velocity vector fields and the vorticity fields are made in scenes for visualisation. (read more in Experiment and CFD Methods)
What we have found in the results about leading edge vortex?
The results show that leading edge vortex exists over the curved plate stably at the angle of attack 2, 3 and 4 degrees. Leading edge vortex grows in size as the angle of attack increases and starts shedding after angle of attack 4 degrees. It is not evident that leading edge vortex has an effect in enhancing lift force. The results also indicate that leading edge vortex has low vorticity and plays a minor role in vorticity production and convection. (read more in Results)
The results show that leading edge vortex exists over the curved plate stably at the angle of attack 2, 3 and 4 degrees. Leading edge vortex grows in size as the angle of attack increases and starts shedding after angle of attack 4 degrees. It is not evident that leading edge vortex has an effect in enhancing lift force. The results also indicate that leading edge vortex has low vorticity and plays a minor role in vorticity production and convection. (read more in Results)