Abstract
The results of the investigation of the reactive flow in a scaled-down (≅1:3) model of a gas turbine combustion chamber are presented. The lean-premix combustion chamber model was tested at atmospheric pressure; measurements in the reactive flow were taken by using a two-channel fibre-optic laser Doppler anemometer with Al 2O 3 seeding on the air flow. Measurements 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 analysis of the fluctuating components of flow velocity; mean flow properties are presented as a prerequisite. Frequency and time domain characteristics of turbulence including power density spectra, autocorrelation coefficients and time integral scales are reported and discussed, and a physical description of the reacting turbulent flow field is attempted.
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