Gas Turbine Combustion with Variable Geometry (Conference Talk)

CBOne participates to the conference NexTurbine in Shanghai, May 13-16th.

Click on the image to download the presentation!

We participate as speaker and participant to the panel discussion on combustion technology development for future GT. 

Link to the conference - > click here


The topic we will present is

Gas Turbine Combustion with Variable Geometry
Dr. Fabrice GIULIANI,



On a conventional gas turbine, the parameter which is set for a given operation is the fuel burn - a direct image of the thermal power required. Usually the fuel is distributed on a pilot and a main line. As the operation point changes, the distribution is set to provide the thermal power, ensure combustion stability together with low emissions.

We studied the opposite option: it is not the flame that is adapted to the operation - it is the combustor that deforms and adapts to the flame. This is called variable geometry, an alternative to staged combustion.

Variable geometry offers advantages versus conventional in terms of extended operation range, control of the flame front position and shape, retarding the transition from detached to attached flame, and pushing forward the lean blowout limit.

This presentation is inspired from works realised by authors at TU Graz from 2007 to 2013 in the frame of the NEWAC research project (EU FP 6, 2006-2011, contract AIP5-CT-2006-030876). For more details please consult the following bibliography:


Thomas LEITGEB, 
On the Design and Validation of a Variable Geometry Burner concept
PhD Thesis, TU Graz, 2013

Design and validation of a burner with variable geometry for extended combustion range.
- in: Proceedings of ASME Turbo Expo 2012, Copenhague, Denmark.


We wish to acknowledge the organisers of the NexTurbine for having selected our works and for kindly inviting us. We are also grateful to the City of Graz and the Austrian Chamber of Commerce who kindly sponsor our venue.