The project has successfully delivered:
- An extensive data base of pressure, temperature and flow measurements for each of the five rotating flow systems;
- Numerical models, in the form of Computational Fluid Dynamics (CFD) and Finite Element (FE) models which have been validated against selected experimental test cases, and which are believed to capture the important physical mechanisms which govern flow and heat transfer in each rotating flow system;
- Through analysis and interpretation of the experimental and numerical results, an improved understanding of the important physical phenomena, and guides to the optimum modelling method for a given situation;
- Correlations of experimental and numerical analysis results for three of the five rotating flow systems.
Objectives and content
This project is concerned with the problems of heat
transfer and fluid flow within gas turbine internal
cooling air systems, with the aim of improving the design
of the latter for both advanced aircraft and electrical
power generation gas turbines. Participants in the
proposal are ten major European engine manufacturers and
four Universities specialising in this type of work.
The approaches will include; (a) advanced experimental
work to obtain much improved data under representative
operating conditions, (b) evaluation of flow and heat
transfer models and CFD codes, (c) development of
improved 3D models and correlation's for design purposes
and (d) establishing a more standardised European
approach to these problems.
The five separate, but related, topics which will be
Turbine annulus hot gas ingestion control.
Airflow and heat transfer in rotating cavities with
axial and axial/radial through flow.
Compressor stator well heating.
Turbine cooling air pre-swirl systems.
Airflow and heat transfer in a high-pressure compressor
drives cone cavity.
These aspects cover the most critical problems which
remain to be solved in the field of internal air systems
design, and the improved understanding resulting from
this project will significantly improve detailed
predictive engine design and reduce the overall engine
production cycle time. In addition, the project will
result in reduced fuel consumption (up to 1%) and longer
component life due to lower cooling air temperatures
within the engine. The project will enable European
turbine engine manufacturers to remain fully competitive
in worldwide markets as well as improving their growing
The proposal is compliant with topics 3A.3.9. And
3A.3.5. Of the IMT program, and could usefully form part
of the proposed targeted research action on 'Efficient
and Environmentally Friendly Aircraft Propulsion'
(EEFAP). The project is also one of the high priority
topics identified by the Engine Industry Management Group
Funding SchemeCSC - Cost-sharing contracts
10127 Torino (Turin)
28830 San Fernando De Henares
BA2 7AY Bath - Avon
BN1 9QT Brighton - East Sussex
461 81 Trollhaettan