Twin Cavity 2D Trapped Vortex Combustor

In the present work, detailed studies of 2D TVC are investigated by using both experimental and numerical methods. For an active cavity flow case, the present results reveal that the pressure drop value across the combustor increases with the mainstream Reynolds number (Rems) due to the higher velocity gradient between the cavity and mainstream flow. Experimental results indicate that the normalized pressure drop values are in the order 0.35 %, which is significantly lower than that of the conventional swirl combustors (4 5 %). An attempt has been made to correlate the flame length with the momentum flux ratio (MFR), overall equivalence ratio (Φo) and Damkohler number (Da), which can be useful for the design of TVC in future. Experimental study of static flame stability limit indicates that the cavity fuel-flow rate has to be increased with the primary air flow rate at particular main stream Reynolds number, (Rems) and equivalence ratio (Φms) for sustaining cavity flame. Through subsequent analysis of the blowout data, a correlation between blowout data and product of Da and MFR is proposed in this work.