**2.2.5 Analysis of the calculation**

Program was run first for characteristic cases of flow around the cylinder and than flow around airfoil.

Due to computer limitations, a rather small number of streamlines is shown. Model is calculated for different angles of attack, different flowfield velocities, different intensities of the moving vortex and its starting position.

The result of complete calculation for 2/3D simulation (include compare with photos from water tunel) is shown at figs. 5-12.

Fig. 5. Fig. 6.

According to the whole mentioned analysis a numerical model was established. This model

for every point in the flowfield it is necessary to determine value of complex potential

 after every time interval t moving vortex changes the stagnation point position which must be compensated by introduction of new vortex which brings stagnation point

new positions of all vortices are calculated by multiplying local velocities and adding

computer program is made so that flow parameters can be calculated for different

Program was run first for characteristic cases of flow around the cylinder and than flow

Due to computer limitations, a rather small number of streamlines is shown. Model is calculated for different angles of attack, different flowfield velocities, different intensities of

The result of complete calculation for 2/3D simulation (include compare with photos from

at a certain moment in a defined initial point a free moving vortex is simulated

vortex diffusion is simulated by variation of the vortex size and arbitrary step

boundary condition of impermeability of the airfoil must be fulfilled

vortices move along the flowfield by the flowfield velocity

**2.2.4 Calculation** 

is based on the following:

and complex velocity

back to its proper place

these values to previous

**2.2.5 Analysis of the calculation** 

water tunel) is shown at figs. 5-12.

the moving vortex and its starting position.

Fig. 5. Fig. 6.

Fig. 7. Fig. 8.

angles of attack.

around airfoil.

trajectory of every vortex is defined

Fig. 11. Fig. 12.
