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Multi-fidelity simulation for secondary air system seal design in aero engines

Multi-fidelity simulation for secondary air system seal design in aero engines
Multi-fidelity simulation for secondary air system seal design in aero engines
Secondary air system seals in aero engines sit at the intersection between all the major aspects of the physics of the system. Their behavior is affected by the air system, the thermal physics, the effect of flight loads and is highly dependent on the engine component movements, the operating conditions, and the supporting hardware. Due to the number of functional and physical interfaces in the engine, seal design is therefore a highly coupled multi physics problem and requires multiple iterations during the design process to converge to a solution that meets system requirements and optimizes engine specific fuel consumption.

At different stages of the design process, simulation models with different levels of fidelity can be built. Due to the long runtimes of high fidelity coupled multi disciplinary models and to the iterative nature of the process, seal design in industry presents significant computational cost challenges, in particular in the phases of the design that require multiple simulation runs.

Multi fidelity computational techniques for surrogate modelling and optimization such as Kriging and co Kriging have been demonstrated on a number of industrial applications and have the potential to significantly reduce the number of function evaluations for computationally expensive optimization problems, improve the accuracy of the predictions of surrogate models and allow the development of improved simulation strategies for a specific product design.

This paper demonstrates the use of multi fidelity simulation techniques on aero engine secondary air system seal design and shows how these techniques can be used in the context of system, sub system and component design. This is achieved by combining results from a simple two dimensional Finite Element Analysis with those from a coupled secondary air system thermomechanical model.

Depending on the stage of the design process and on the specific design decisions being made, the use of computational power in simulation often comes down to a trade off between reduced overall computational time and improved result accuracy. Multi fidelity simulation frameworks provide the environment to drive holistic choices on the simulation strategy, reducing the cost of the design and offering agility in the industrial response to market changes or new technologies. Moreover, this methodology establishes an infrastructure for updating the virtual product at each step of the product lifecycle, allowing experimental or service data to feed the system level simulation models to produce a digital twin.
Nasti, Adele
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Voutchkov, Ivan
16640210-6d07-49cc-aebd-28bf89c7ac27
Toal, David
dc67543d-69d2-4f27-a469-42195fa31a68
Keane, Andy
26d7fa33-5415-4910-89d8-fb3620413def
Nasti, Adele
4fdd6942-d867-4bfe-aea3-3b32c30cdb6e
Voutchkov, Ivan
16640210-6d07-49cc-aebd-28bf89c7ac27
Toal, David
dc67543d-69d2-4f27-a469-42195fa31a68
Keane, Andy
26d7fa33-5415-4910-89d8-fb3620413def

Nasti, Adele, Voutchkov, Ivan, Toal, David and Keane, Andy (2022) Multi-fidelity simulation for secondary air system seal design in aero engines. ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, , Rotterdam, Netherlands. 13 - 17 Jun 2022. 11 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Secondary air system seals in aero engines sit at the intersection between all the major aspects of the physics of the system. Their behavior is affected by the air system, the thermal physics, the effect of flight loads and is highly dependent on the engine component movements, the operating conditions, and the supporting hardware. Due to the number of functional and physical interfaces in the engine, seal design is therefore a highly coupled multi physics problem and requires multiple iterations during the design process to converge to a solution that meets system requirements and optimizes engine specific fuel consumption.

At different stages of the design process, simulation models with different levels of fidelity can be built. Due to the long runtimes of high fidelity coupled multi disciplinary models and to the iterative nature of the process, seal design in industry presents significant computational cost challenges, in particular in the phases of the design that require multiple simulation runs.

Multi fidelity computational techniques for surrogate modelling and optimization such as Kriging and co Kriging have been demonstrated on a number of industrial applications and have the potential to significantly reduce the number of function evaluations for computationally expensive optimization problems, improve the accuracy of the predictions of surrogate models and allow the development of improved simulation strategies for a specific product design.

This paper demonstrates the use of multi fidelity simulation techniques on aero engine secondary air system seal design and shows how these techniques can be used in the context of system, sub system and component design. This is achieved by combining results from a simple two dimensional Finite Element Analysis with those from a coupled secondary air system thermomechanical model.

Depending on the stage of the design process and on the specific design decisions being made, the use of computational power in simulation often comes down to a trade off between reduced overall computational time and improved result accuracy. Multi fidelity simulation frameworks provide the environment to drive holistic choices on the simulation strategy, reducing the cost of the design and offering agility in the industrial response to market changes or new technologies. Moreover, this methodology establishes an infrastructure for updating the virtual product at each step of the product lifecycle, allowing experimental or service data to feed the system level simulation models to produce a digital twin.

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Published date: 13 June 2022
Venue - Dates: ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, , Rotterdam, Netherlands, 2022-06-13 - 2022-06-17

Identifiers

Local EPrints ID: 467365
URI: http://eprints.soton.ac.uk/id/eprint/467365
PURE UUID: 92756514-7b52-41e4-b85c-dda16e921d88
ORCID for David Toal: ORCID iD orcid.org/0000-0002-2203-0302
ORCID for Andy Keane: ORCID iD orcid.org/0000-0001-7993-1569

Catalogue record

Date deposited: 07 Jul 2022 16:57
Last modified: 17 Mar 2024 03:10

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Contributors

Author: Adele Nasti
Author: Ivan Voutchkov
Author: David Toal ORCID iD
Author: Andy Keane ORCID iD

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