TURBOPOWER - TURB Esa Utriainen Copyright © Siemens AG 2007. All rights reserved.

A Gas Turbine A tough environment… High power density, 340kW / blade1 for SGT800 Centrifugal load 32000G, Blade 1 0,8 kg becomes 26ton in the engine. High pressure and temperature, more than 1400C @ 20bar, Vane 1 inlet Sensitive materials (900C), every 10-15 C increase equals halving the lifetime of the blading component

Not possible to optimise a design for each discipline, the best compromise is the best design Me last year

Not possible to optimise a design for each discipline, the best compromise is the best design Me this year

The TURBOPOWER-TURB projects TURB 1 Efficiency Improvements of High Pressure Turbine Stage TURB 2 Opportunities in Film Cooling TURB 3 Cooling of Hot Internal Turbine Structures TURB 4 Tip Cooling

Film cooling test rig, Finspång Transient technique to measure both film cooling effectiveness and heat transfer coefficient in one measurement

Three different configurations tested Scale 3.5 : 1

Film cooling effectiveness Figure 12: The local heat flux distribution for vane configuration 1 (blue), configuration 2 (green) and configuration 3 (red).

Next step, measurements of row by row effectiveness to produce correlations

day month year Volvo Aero contribution to TURBOPOWER/Turbine “3 min statement” Hans Abrahamsson April 7th 2010 Company, Department, Name

Work done in the past Earlier (until 2008) Volvo Aero was involved in the build up of the new channel flow test rig at LTH, and performed initial measurements. To be published at ASME Turbo Expo, in year xx… During 2009 (since last program conference) – Volvo Aero activities supporting ”Turbine” area has been quite small, limited to: Direct support and involvement to TURB3, by Hans Abrahamsson and Andreas Borg. Several meetings and discusions, concerning progress and problems in work. Explaining the link to the application. … Diploma work by Daniel Nygren (Turning vane heat transfer, external flows) Build up of thermal analysis system for front turbine structures. ANSYS thermal model Conjugate CFD model incl radiation Day month year Subject

Look ahead Volvo internal work connected to ”turbine structure internal flows” (i.e. TURB3) is expected to be quite small, due to changed internal priority. But… general heat transfer validation of CFD for ”internal flows” is still of interest, although more connected to turbine structures is general (cooling and ventilation of front turbine structures). Volvo Aero (Hans Abrahamsson + Andreas Borg) will support TURB3 as needed. Plans/ideas for 2010: Diploma work connected to TURB3, CFD validation of ”shallow jet impingement” and ”ribs” – i.e. use the experimental results provided by TURB3. Design of experiment for ”simplified jet case” (injection by fully developed pipe flow) Publications of earlier work in Lund test rig. Connection to vane heat transfer test in Chalmers linear cascade? Wake and endwall interaction (for e.g. blockages and vanes). Day month year Subject

List of ideas/needs for the future… Surface roughness influence on heat transfer. Internally ventilated structural vanes Heat transfer for separated vanes (off-design conditions), wake and endwall interaction. Day month year Subject