DEVELOPMENT OF FLOW FROM MULTIPLE-JET BURNERS

Multiple-jet cold-model burners aerodynamically simulating a class of industrial burners were studied. The fields of mean velocity and veloc ity fluctuation intensity were measured with Pitot probes. The validit y of an effective source diameter as a characteristic length scale is demonstrated. Beyond the nearfield, the flows are virtually the same, and similar to a round jet from a single source. In the nearfield, ind ividual structures peculiar to each burner are observed. The results s upport the mathematical modelling, for some types of simulations, of f lows from complex burners as point-source jets, affording a substantia l simplification of the treatment.