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Design, Manufacture and Control of a Fluidic Thrust Vectoring System in Small Scale

Rahat Varnoosfaderani, Ehsan | 2008

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39180 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Saghafi, Fariborz
  7. Abstract:
  8. Thrust vector control as a method toward increasing of the aircrafts’ maneuverability and expanding the flight envelope into poor aerodynamic conditions, is considered a major field of academic and industrial appeal. Older methods based upon an approach of utilizing a mechanical instrument, impose quite a large amount of cost onto the design, prototyping and operation of the aircraft, even though they lead to improve in maneuverability. Having taken these setbacks into account, to simplify the manufacturing process and to reduce the thrust losses due to mechanical control of the thrust vector, the direction of research was set toward realizing and employing the flow control procedures. In the present dissertation great attention has been paid to design and prototyping of the test stand that is intended to monitor the thrust vector control technique. There are a variety of fluidic thrust vector control methods among which the present method, entitled co-flow thrust vector control, has been tested and verified here. The final goal in this study is to collect adequate data for the design process of an aircraft with capability of thrust vector control through this method. Therefore it is carried out in parallel with another thesis aiming at the design of such an air vehicle. The flow field has been analyzed by means of computational fluid dynamics techniques. In the first step, ducts and nozzle have been mathematically modeled and the design parameters have been investigated; next, through variation of parameters in a definite range, a group of various shapes are produced. Solving these shapes and calculating the objective values by using CFD, a collection of data required for the design process are prepared. Based on the obtained data the decisions have then been made on the flow generation method, as well as dimensions and geometrical parameters of the stand. Following the above procedure, modeling, designing and prototyping of the test stand are in order. According to this fact that the stand is prototyped for testing purposes, a maximum deal of precision is required for building it. And last however by no means the least; the design is validated after measuring the forces due to fluidic thrust vector control and comparing the subsequent behavior and results of the test to those of the CFD techniques.
  9. Keywords:
  10. Test Stands ; Computational Fluid Dynamics (CFD) ; Fluidic Thrust Vectoring control ; Co-Flow Method

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