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Aerodynamic Design and Parametric Investigation of Power Turbine for a Turbo Jet Engine

Mani, Alireza | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48294 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Hajilouy Benisi, Ali
  7. Abstract:
  8. In this research, it is aimed to convert a turbojet engine to a turboshaft by replacing the exhaust nozzle with a new designed power turbine stage. The design procedure is backed up with parametric studies to increase efficiency. At first a program is written for one dimensional modelling of the stage of axial turbine. By the way, the three dimensional modelling of the stage of axial turbine with Ansys-cfx business software is done. These methods are validated by modelling the gas generator turbine and comparison of their results with experimental results. Then the power turbine including the blades and the geometry of flow walls on shaft and casing are designed. The performance of power turbine is predicted with one dimensional modelling program and necessary corrections are implemented. Then by choosing a flow model, the velocity triangles are obtained and blades are designed on other radiuses. At last the stage of the power turbine performance is predicted with the selected three dimensional modelling program. To reducing the kinetic energy losses, an axial diffuser is designed at the outlet of power turbine. The designed power turbine at designed point has 0.89 total to total isentropic efficiency, 0.68 total to static isentropic efficiency and 288 kW outlet power. This design can be used in turbo-generators, turbo-compressors and turbo-pumps
  9. Keywords:
  10. Turboshaft ; Turbojet ; Aerodynamic Design ; Turbine Modeling ; Axial Flow Turbine

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  • بسم الله
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  • کمیته ممتحنین
  • اظهارنامه
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  • متن پایانی2
  • Full text
    • [7] Wilson D.G., “The Design of High Efficiency Turbomachinery and Gas Turbines”, Massachusetts Institute of Technology, 1988.
  • کاور مقاله شریف
  • مقاله شریف باز شده
    • [8] Wilson D.G., “The Design of High Efficiency Turbomachinery and Gas Turbines”, Massachusetts Institute of Technology, 1988.
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