ABSTRACT
The non-premixed, bluff-body burner provides both an industrially significant flow configuration and an academically useful tool for the development and validation of predictive CFD models. In practical combustion devices, the bluff-body configuration is used to provide flame stabilisation in a wide range of burner sizes from commercial scale combustors of just a few kilowatts to industrial scale burners of several megawatts. In terms of CFD modelling, the unsteady nature of the flame!f1ow interaction in the recirculating flow of a bluff-body wake provides a challenging scenario for physical sub-model development. A review of public domain literature revealed that there is a paucity of experimental velocity measurements for confined bluff-body stabilised flames, particularly those at high blockage ratio where flow effects due to confinement are most likely to be significant. Previous studies of bluff-body stabilised flows have provided detailed measurements of temperatures and mixture fractions by Correa and co-workers [ 1 ,2] for a confined axisymmetric bluff-body combustor with a low value of the blockage ratio of 0 . 1 25 , Roquemore et al [3] provided
regions o f high turbulent shear stress u'v' broadly appear in the vicinity o f regions with high mean velocity gradients .
