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Communication Dans Un Congrès Année : 2022

Design of a Freely Rotating Wind Tunnel Test Bench for Measurements of Dynamic Coefficients

Muller Laurène
  • Fonction : Auteur
  • PersonId : 1254449
ISL
Libsig Michel
  • Fonction : Auteur
  • PersonId : 1254450
ISL

Résumé

The needs to improve performances of artillery projectiles require accurate aerodynamic investigation methods. The aerodynamic design of a projectile usually starts from numerical analyses, mostly including semiempirical methods and/or Computational Fluid Dynamics (CFD), up to experimental techniques composed of wind-tunnel measurements or free-flight validations. In the frame, the present paper proposes a dedicated measurement methodology able to simultaneously determine the stability derivative C mα and the pitch damping coefficient sum Cmq + Cmα in a wind tunnel by means of a single and almost non-intrusive metrological setup called MiRo. This method is based on the stereovision principle and a three-axis freely-rotating mechanical test bench. In order to assess the reliability, repeatability and accuracy of this technique, the MiRo wind tunnel measurements are compared to other sources like aerodynamic balance measurements, alternative wind tunnel measurements, Ludwieg tube measurements, free-flight measurements and CFD simulations.
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Dates et versions

hal-04105867 , version 1 (31-05-2023)
hal-04105867 , version 2 (07-09-2023)

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Muller Laurène, Libsig Michel. Design of a Freely Rotating Wind Tunnel Test Bench for Measurements of Dynamic Coefficients. 56th 3AF International Conference on Applied Aerodynamics, Association Aéronautique et Astronautique de France (3AF), Mar 2022, Toulouse, France. ⟨hal-04105867v2⟩
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