Project in jet engine OGV aerodynamics Vane design

Vane design About me… • Working at the department of aerothermodynamics at Volvo Aero

Vane design Objective • Introduce Outlet Guide Vane (OGV) • Give introduction to vane

Vane design What is an OGV? • The OGV is situated behind the LPT.

Vane design Functions • Turn the flow to axial. • Load carrier since the

Vane design Design goal • High engine thrust (low pressure loss) • Larger swirl

Vane design Designing an OGV 10111 Utg. 4 1. • Design cases: 1. On-design,

Vane design Designing an OGV • Start by designing a 2 D vane at

Vane design Designing Geometry generator an OGV today Mesh in Gambit CFD calculations in

Vane design Designing an OGV • Check no separation at off-design • Make a

Vane design The design process • CFD • Mesh and calculate the nine OGV

Vane design CFD-data Given data for CFD calculations: • Inlet angle = 30 degrees

Vane design The designed test-facility 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 13

Vane design The designed test-facility Test rigg Vane 10111 Utg. 4 7161, Sofia Ore

Vane design Thank you and good luck! 10111 Utg. 4 7161, Sofia Ore 9/17/2020,

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Project in jet engine OGV aerodynamics - Vane design 9/17/2020 The information contained in this document is Volvo Aero Corporation Proprietary Information and it shall not – either in its original or in any modified form, in whole or in part – be reproduced, disclosed to a third part, or used for any purpose other than that for which it is supplied, without the written consent of Volvo Aero Corporation. Any infringement of these conditions will be liable to legal action.

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. • Master thesis about optimisation of a outlet nozzle using response surface methodology at Volvo. 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 2 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design Objective • Introduce Outlet Guide Vane (OGV) • Give introduction to vane design fundamentals 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 3 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design What is an OGV? • The OGV is situated behind the LPT. • It is a part of the rear structure. 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 4 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design 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. 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 5 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design 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 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 6 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design Designing an OGV 10111 Utg. 4 1. • Design cases: 1. On-design, Cruise 2. Off-design, ± 10 degrees • In off-design conditions separation may occur which leads to increased pre • Most problematic area is the suction side, especially near the end-walls. 2. 7161, Sofia Ore 9/17/2020, Slide 7 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design Designing an OGV • Start by designing a 2 D vane at the midspan using given criterias such as: • tmax (oil pipes) • inlet boundary conditions (from the turbine) • inlet velocity Shroud • inlet angle • inlet pressure • pitch • span Hub 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 8 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design Designing Geometry generator an OGV today Mesh in Gambit CFD calculations in Fluent 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 9 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design Designing an OGV • Check no separation at off-design • Make a 3 D model and check the criterias. 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 10 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design The design process • CFD • Mesh and calculate the nine OGV • Optimisation • Find the best OGV from the ones you get • Experiment • Design a 3 D model of the OGV including pressure taps • Manufacture • Validation 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 11 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design CFD-data Given data for CFD calculations: • Inlet angle = 30 degrees (on design) • Inlet velocity = 20 m/s • Outlet pressure = 101330 Pa 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 12 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design The designed test-facility 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 13 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design The designed test-facility Test rigg Vane 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 14 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.

Vane design Thank you and good luck! 10111 Utg. 4 7161, Sofia Ore 9/17/2020, Slide 15 Volvo Aero Corporation Proprietary Information This information is subject to restrictions on title page.