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Project in jet engine OGV aerodynamics - Vane design

Project in jet engine OGV aerodynamics - Vane design. About me…. Working at the department of aerothermodynamics at Volvo Aero in Trollhättan. Studied at Chalmers, Master of science in chemistry and physics spring 2006.

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Project in jet engine OGV aerodynamics - Vane design

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  1. Project in jet engine OGV aerodynamics- Vane design

  2. About me… • Working at the department of aerothermodynamics at Volvo Aero in Trollhättan. • Studied at Chalmers, Master of science in chemistry and physics spring 2006. • Master thesis about optimisation of a outlet nozzle using response surface methodology at Volvo. 7161, Sofia Ore

  3. Objective • Introduce Outlet Guide Vane (OGV) • Give introduction to vane design fundamentals 7161, Sofia Ore

  4. What is an OGV? • The OGV is situated behind the LPT. • It is a part of the rear structure. 7161, Sofia Ore

  5. Functions • Turn the flow to axial. • Load carrier since the rear engine mount is situated in the rear structure. • Oil pipes through some vanes implies constraints on their thickness. 7161, Sofia Ore

  6. Design goal • High engine thrust (low pressure loss) • Larger swirl angle out of the LPT => • Higher efficency in the LPT • Lighter engine because one stage in the LPT can be taken away. => large flow turning in the OGV 7161, Sofia Ore

  7. Designing an OGV 1. • Design cases: • On-design, Cruise • Off-design, ±10 degrees • In off-design conditions separation may occur which leads to increased pressure losses. • Most problematic area is the suction side, especially near the end-walls. 2. 7161, Sofia Ore

  8. Shroud Hub Designing an OGV • Start by designing a 2D vane at the midspan using given criterias such as: • tmax (oil pipes) • inlet boundary conditions (from the turbine) • inlet velocity • inlet angle • inlet pressure • pitch • span 7161, Sofia Ore

  9. Designing an OGV today Geometry generator Mesh in Gambit CFD calculations in Fluent 7161, Sofia Ore

  10. Designing an OGV • Check no separation at off-design • Make a 3D model and check the criterias. 7161, Sofia Ore

  11. The design process • CFD • Mesh and calculate the nine OGV • Optimisation • Find the best OGV from the ones you get • Experiment • Design a 3D model of the OGV including pressure taps • Manufacture • Validation 7161, Sofia Ore

  12. CFD-data Given data for CFD calculations: • Inlet angle = 30 degrees (on design) • Inlet velocity = 20 m/s • Outlet pressure = 101330 Pa 7161, Sofia Ore

  13. The designed test-facility 7161, Sofia Ore

  14. The designed test-facility Test rigg Vane 7161, Sofia Ore

  15. Thank you and good luck! 7161, Sofia Ore

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