.: code JoukowskiAF_BL
Calculates X,Y coordinates and pressure distribution on Joukowski airfoil.
Calculates parameters of boundary layer on upper and lower surfaces.
The user interface is implemented using FOX toolkit library.
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.: Panel Joukowski Airfoil
On this panel the airfoil geometry and pressure distribution is represented.
When you press the button [SAVE RESULT] the code creates new file with current calculation result: Airfoil_i.out, i-order number.
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.: initial data:
| N | the number of calculation nodes |
| Alpha | angle of attack |
| e/R1 | maximum thickness parameter |
| h/R1 | maximum camber parameter |
| Del e,h | increment for spinners: e/R1, h/R1 |
| Del Angle | increment for spinner: Alpha |
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.: computation results:
| C lift | lift coefficient |
| Cm focus | moment coefficient about focus |
| X focus | X-coordinate of focus |
| Y focus | Y-coordinate of focus |
| Max th(sym) | maximum thickness for h/R1=0 |
| Camber | maximum camber |
| Alpha (Cl=0) | angle of attack for Clift=0 |
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.: panel Boundary Layer. Calculation.
The calculation boundary-layer results by finite-difference method is presented on this panel.
Before separation point the boundary layer is calculated by direct method,
after separation point - by inverse method with specified friction coefficient.
Red label is position of separation point.
Initial data for boundary-layer calculation is saved in file: InputBL.out.
In upper window the velocity distribution on upper or lower suface is shown.
The velocity computed by inverse method is drawn by red color.
The one of the calculated functions is represented in low window.
The results of the boundary layer calculations is saved in file: CalcBL.out.
You have to press the button [RECALCULATE] if the input data is changed
Str - the point of transition (Blue label). u - upper surface, l - lower surface.
Sinv - the point of separation (Red label).
The point of transition is calculated by Mishel's method or is specified by user.
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.: input data:
| Re | Reynolds number |
| ETAe | initial value of the transformed boundary-layer thickness |
| Kv | ratio of two successive steps in normal direction |
| Np | initial value of the total number of nodes in normal direction |
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.: calculation results:
| Cf(s) | friction coefficient |
| D1(s) | thickness displacement |
| D2(s) | momentum displacement |
| H12(s) | form parameter |
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