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Main Annulus Gas Path Interactions

Objective

In a modern aero engine, up to 20% of the main annulus flow is bled off to perform cooling and sealing functions. The vicinity of these bleed ports and flow sinks is characterised by complex unsteady swirling flows, which are not fully understood. Even the most up-to-date numerical tools have difficulties predicting the behaviour of the secondary flow system when interacting with the main annulus. The project addresses interactions between main gas path and secondary flow systems in commercial gas turbines in response to Research Activity AERO-2005-1.3.1.2a Concepts and technologies for improving engine thermal efficiency and reducing secondary air losses. Experiments are planned on turbine disc rim and compressor manifold cavity heat transfer, hot gas ingestion, and spoiling effects of cooling air flow and their impact on turbine and compressor performance, as well as a reduction of secondary air losses.

The experimental data will be used for better understanding of the complex flow phenomena and improvements of platform and cavity design. Furthermore, the industrial partners will validate their design tools with these test data and improve their prediction capability of secondary flow systems when interacting with the main gas path. The expected results are a reduction of cooling and sealing airflow rates, improvements of the turbine and compressor efficiency and increase of the safety margin of the engine components by better cooling.

Expected technical results are:
- Knowledge of the interaction phenomena and its effect on cavity heat transfer, spoiling and performance,
- Experimental results for validation of improved numerical tools for secondary flow systems,
- Optimised design methods and CFD best practice guidelines.

The targeted outcome will contribute to the ACARE goal of reduced CO2 emissions via reduced fuel burn of 2% to improve the environment and strengthening the competitiveness of European gas turbine manufacturers.

Call for proposal

FP6-2005-AERO-1
See other projects for this call

Funding Scheme

STREP - Specific Targeted Research Project

Coordinator

ROLLS-ROYCE DEUTSCHLAND LTD & CO KG
Address
Eschenweg 11
1536 Blankenfelde-mahlow
Germany

Participants (15)

SNECMA
France
Address
2 Boulevard Du General Martial Valin
Paris
ROLLS-ROYCE PLC
United Kingdom
Address
65, Buckingham Gate
London
AVIO S.P.A.
Italy
Address
Strada Del Drosso, 145
Torino
AVIO S.P.A.
Italy
Address
Strada Del Drosso 145
Torino
SIEMENS INDUSTRIAL TURBOMACHINERY LTD
United Kingdom
Address
Ruston House, Po Box 1, Waterside South
Lincoln
ALSTOM (SWITZERLAND) LTD.
Switzerland
Address
Brown Boveri Strasse 7
Baden
INDUSTRIA DE TURBO PROPULSORES S.A.
Spain
Address
Parque Tecnológico, Nº300
Zamudio (Vizcaya)
MTU AERO ENGINES GMBH
Germany
Address
Dachauer Strasse 665
Muenchen
TURBOMECA
France
THE UNIVERSITY OF SURREY
United Kingdom
Address
University Of Surrey
Guildford, Surrey
UNIVERSITY OF SUSSEX
United Kingdom
Address
Falmer
Brighton
DARMSTADT UNIVERSITY OF TECHNOLOGY
Germany
Address
Petersenstraße 30
Darmstadt
UNIVERSITA DEGLI STUDI DI FIRENZE
Italy
Address
Piazza San Marco 4
Firenze
UNIVERSIDAD POLITECNICA DE MADRID
Spain
Address
Ramiro De Maeztu 7
Madrid
KARLSRUHER INSTITUT FÜR TECHNOLOGIE
Germany
Address
Kaiserstrasse 12
Karlsruhe