A fundamental study of flow characteristics and heat transfer in multiple burner oilfired marine boilers.

This study has shown that the main characteristics of axial velocity decay and recirculation in multiple enclosed jets can be related to those of single enclosed jets. This is achieved by considering each jet to be bounded by an imaginary duct whose dimensions can be related to the nozzle spacing parameters. If the nozzles are close together compared with the surrounding chamber, the above treatment is only valid near- to the nozzles. Further downstream the jets coalesce and their behaviour can be related to that of a single jet by an equivalent nozzle radius.