Research Article
A Comparison of the Characteristics of Planar and Axisymmetric Bluff-Body Combustors Operated under Stratified Inlet Mixture Conditions
Table 1
Operating conditions and parameters.
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(1) is percent deviation from LBO, (%), (, fuel flow at lean blowoff). m/s for disk and 0.64 m/s for square. (2) : maximum measured wake temperature. (3) : visible flame length; : measured recirculation length. (4) Central air supply velocity for disk, m/s and ReDb = 7980 for all cases, coflow velocities in annular swirl stream at , m/s, surrounding shielding stream velocity, m/s. Approach airflow for square, m/s and for all cases. (5) , global equivalence ratio, based on mass flows of injected fuel and, (a) air supply in the central pipe for the disk, or (b) approach airflow over the tunnel height for the square. (6) location for the disk was at () = (0.4, 0.45), while for the square this was at () = (0.7 to 1.0, 0.9). |