Abstract:
The aim of this research is to develop an optimisation tool to support the
preliminary design of gas turbine combustors by providing a partial automation of the design process. This tool is to enable better design to be obtained faster, providing a reduction in the development costs and time to market of
new engines.
The first phase of this work involved the analysis of the combustor design
process with the aim of identifying the critical tasks that are suitable for being
automated and most importantly identifying the key parameters describing
the performance of a combustor.
During the second phase of this work an adequate design methodology for this
problem was defined. This led to the development of a design optimisation
Toolbox based on genetic algorithms, containing the tools required for it's
proper integration into the combustor preliminary design environment. For
the development of this Toolbox, extensive work was performed on genetic
algorithms and derived techniques in order to provide the most efficient and
robust optimisation method possible.
The optimisation capability of the Toolbox was first validated and metered
on analytical problems of known solution, where it demonstrated excellent optimisation performance especially for higher-dimensional problems. In a second step of the testing and validation process the combustor design capability of the Toolbox was demonstrated by applying it to diverse combustor design test cases. There the Toolbox demonstrated its capacity to achieve
the required performance targets and to successfully optimise some key combustor parameters such as liner wall cooling flow and NOx emissions. In addition, the Toolbox demonstrated its ability to be applied to different types of engineering problems such as wing profile optimisation.
