1. Project in jet engine OGV aerodynamics - Vane design
Company, Department, Name
day month year

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.
, Slide 2
7161, Sofia Ore

3. Objective Introduce Outlet Guide Vane (OGV)
Give introduction to vane design fundamentals
7161, Sofia Ore
, Slide 3
Company, Department, Name
day month year

4. What is an OGV? The OGV is situated behind the LPT.
It is a part of the rear structure.
, Slide 4
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.
, Slide 5
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
, Slide 6
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
, Slide 7

8. 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
Hub
Shroud
7161, Sofia Ore
, Slide 8

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

10. Designing an OGV Check no separation at off-design
Make a 3D model and check the criterias.
, Slide 10
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
, Slide 11
7161, Sofia Ore

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

13. The designed test-facility
, Slide 13
7161, Sofia Ore

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

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