Turbulent flow field measurements in a model gas turbine combustion chamber

The results of the investigation of the reactive flow in a scaled-down (con gruent to 1:3) model of a gas turbine combustion chamber are presented. The lean-premix combustion chamber model was tested at atmospheric pressure; m easurements in the reactive flow were taken by using a two-channel fibre-op tic laser Doppler anemometer with Al2O3 seeding on the air flow. Measuremen ts cover a wide region of the axial-symmetric combustion chamber at points characterised by different seeding conditions and data rates, including the flame development and recirculating zones. This work presents a detailed a nalysis of the fluctuating components of flow velocity; mean flow propertie s are presented as a prerequisite. Frequency and time domain characteristic s of turbulence including power density spectra, autocorrelation coefficien ts and time integral scales are reported and discussed, and a physical desc ription of the reacting turbulent flow field is attempted. (C) Elsevier, Pa ris.