Abstract
This paper presents a computational study of swirling flow in a tangentially-fired air blown entrained flow Mitsubishi Heavy Industries gasifier in a non-reactive environment. Flow fields are obtained by using the Reynolds-averaged Navier Stokes turbulence model. Shear-stress transport k-ω model is used for the modelling the effect of turbulence. Variation in length of the internal recirculation zone with the swirl number for tangentially injected flow is reported. It is observed that for the MHI gasifier the length of the internal recirculation zone in a non-reactive environment increases upon increasing the swirl number at the inlet of the gasifier.
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