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Design of a Table Top Wind Tunnel with 3 Axis Balance for Airplane Identification

Poureh, Ramin | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56775 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Pourtakdoust, Hossein
  7. Abstract:
  8. Experimental determination of aircraft aerodynamic characteristics is of prim importance in evaluation of its trimability and stability requirements. One of the most common tools for experimental identification of aircraft is the wind tunnel equipped with aerodynamic force and moment balance system. Design and development of wind tunnel equipped with such system for measuring aerodynamic forces and moments can affect the accuracy and quality of identifying the aircraft dynamics. However, since procurement of such professional systems is very expensive, the primary goal of this project is focused on initial design of a tabletop wind tunnel with a force and moment balance system. In addition, for a better matching with flight dynamics research needs and novelties, the balance design was upgraded to a 3 axis force balance with 3 degrees of freedom (DoF) rotational motion capability to capture the aircraft dynamic behavior for identification purposes. In this regard, the wind tunnel design process was carried for virtual flight-testing and verified using simulation tools. Moreover, the 3 axis force balance system was designed in parallel whose vibrational performance and stress-strain range was investigated using finite element analysis. To evaluate the rotational 3 DoF mechanism, an initial test stand is designed and constructed using a spherical joint with an inertial measurement unit (IMU). Subsequently, the performance of this system was experimentally evaluated for a flapping vehicle in the wind tunnel
  9. Keywords:
  10. Wind Tunnel ; Virtual Flight Test Laboratory ; System Identification ; Aerodynamic Derivatives ; Three Axis Force Balance ; Three Degree of Freedom Rotational Mechanism ; Aircraft Dynamic

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