GKN delivers greener turbine exhaust to MTU

The module includes a novel lightweight turbine exhaust case design with separated thermal and mechanical functionality. It can withstand higher temperatures than current TEC's, but also saves weight.

GKN Aerospace engineers in Trollhättan Sweden, have successfully designed, developed and delivered a new Turbine Exhaust Module to MTU in Germany as part of the EU funded Clean Sky-2 EMVAL demonstrator programme. The Turbine Exhaust Module is paramount for heat dissipation and performance of an aero engine and therefore a key component in improving the efficiency.

The EMVAL (Engine Material VALidation) engine demonstrator project includes the development and testing of a new MTU turbine module and a new GKN Aerospace turbine exhaust module, using an existing turboshaft engine modified as a test vehicle. The ground testing of the full-scale engine demonstrator later this year at MTU is a key milestone in validation of the concept.

The module from GKN Aerospace includes a novel lightweight turbine exhaust case (TEC) design with separated thermal and mechanical functionality. It has been produced with extensive use of additive manufacturing (AM). The TEC consists of an inner load carrying structure and aerodynamically shaped vanes (or heat shielding fairings). This concept can withstand higher temperatures than current TEC's, but it also saves weight as the axial length can be reduced.

Lars Ellbrant,Technology Programme Manager for the exhaust module development at GKN Aerospace says: “This type of demonstrator project is absolutely vital for GKN Aerospace in order to validate our new technologies at high TRL levels (TRL 5-6) using a full engine test together with international partners”

The aviation industry has agreed to become climate neutral by 2050 and reducing fuel consumption is fundamental to reach this goal. The engines demonstrations made within the European Clean Sky 2 programme will validate new solutions for the next generation of ultra-efficient aircraft engines.