File:Erreur Antenne Prandtl en incidence.png
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[edit]DescriptionErreur Antenne Prandtl en incidence.png |
Français : Erreur relative d'une antenne de Prandtl en incidence, d'après Pierre Rebuffet. On note au vu de ce graphe que les erreurs de mesure sur la pression totale et la pression statique se compensent.
English: Relative error of a Prandtl antenna in incidence, according to Pierre Rebuffet. It is noted from this graph that the measurement errors on the total pressure and the static pressure compensate each other. |
Date | |
Source | Own work |
Author | Bernard de Go Mars |
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Annotations InfoField | This image is annotated: View the annotations at Commons |
Pierre Rebuffet, Aérodynamique expérimentale, 1962, Librairie Polytechnique Ch. Béranger, Paris, ouvrage essentiel, non réédité.
Pour ce graphe, Rebuffet se revendique de l'ouvrage Ergebnisse der Aerodynamischen Versuchsanstalt zu Göttingen, II. Lieferung, avec la participation de C. Wieselsberger et A. Betz, publié par L. PRANDTL, ISBN -978-3-941875-36-4/Prandtl_2.pdf.
Dans cet ouvrage, Prandtl écrit : " Jusqu'à 15° d'inclinaison de l'axe du tube de Pitot par rapport à la direction du vent, la vitesse est correctement affichée à moins de 1%. Avec une inclinaison de 20°, l'erreur de la vitesse calculée à partir de la pression dynamique est de -1,9 %, à 30° de -10,5 %."
Ce schéma est tiré de PITOT-STATIC TUBES FOR DETERMINING THE VELOCITY OF AIR, KUMBRUCH H., 1925, NACA Technical Memorendum N° 303 [1].
La tête du tube de cette antenne de Prantl est bien hémisphérique.
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