Prediction of Combustion Induced Oscillations Using a Pressure-Correction Method

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Abstract
The objective of the present paper is to describe the development and testing of a CFD method based on a pressure-correction formulation for the prediction of reheat-buzz-type combustion induced oscillations. A quasi-1D approach was adopted to describe the acoustic phenomena occurring in a typical premixed flame stabilised on a conical gutter. Experimentally deduced unsteady heat release data available in the published literature were used to drive the calculations. Excellent agreement was observed between measured and predicted mode shapes and phase distributions of the unsteady pressure field. Calculations also indicated that the measured buzz frequencies could be reasonably well predicted.

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