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Vent apparent, force vélique, trainée |
| \[ \hskip-1.42263779528pt\begin{array}{l}V_ a=-(V\cos (\theta )+u)e_ x+V\sin (\theta )e_ y,\\ \cos (\mu _ a)=\displaystyle \frac{\sin (\theta -\alpha )-\frac{u}{V}\sin (\alpha )}{\sqrt {1+2\frac{u}{V}\cos (\theta )+(\frac{u}{V})^2}}\\ F_ x=\displaystyle \frac{\varrho _ aS_ a\vert \vert V_ a\vert \vert _2^2}{2}\cos (\mu _ a)^2\sin (\alpha ), \\ T_ x=\displaystyle \frac{\varrho _ e S_ e\vert u\vert ^2}{2} \end{array} \] |
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Equation de la vitesse d’avancement en fonction du bordage des voiles $\alpha $ pour différentes amures $\theta $ |
| \[ F_ xc_ z^{v}(\mu _ a)=T_ xc_ x^ b \]
![\includegraphics[width=4.7cm,height=2.22cm]{aeroimages/image2-805.png}](images/img-0025.png) |
Voir le code (Calcul de $(F_ x-T_ x)(u ,\alpha )=0$): python , matlab .
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![\includegraphics[width=4.7cm,height=2.22cm]{aeroimages/image2-806.png}](images/img-0026.png) |
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![\includegraphics[width=5.2cm,height=3.2cm]{aeroimages/image2-299.png}](images/img-0024.png)
