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Two-component laser anemometry measurements of non-reacting and reacting complex flows in a swirl-stabilized model combustor


Simultaneous two component velocity measurements are acquired in a model, complex flow swirl stabilized combustor using a two colour laser anemometer. Isotropy is satisfied except in regions of high unidimensional shear, and both turbulence intensity and normalized Reynolds stress are reduced in the absence of reaction. Relatively small form intermittencies, associated with a fluctation of the stagnation point and a precessing vortex core, serve to reduce the measured values of the normalized Reynolds stress at the centreline by increasing the apparent turbulence intensity at an elevated fuel loading, a global scale form intermittency is invoked and, while likely realistic relative to practical devices, may not be a viable condition for time averaged calculations. (from authors' abstract)

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