Figure 4.23. Fuel Atomizer.
fuel into the combustion chamber through the action of the flow
divider. Fuel entering the primary section of the atomizer passes
through the primary screen and continues to flow through the center
of the nozzle to the swirl chamber located internally in the head of
the nozzle. Here it passes through three swirl slots and is
discharged into the combustion chamber at a 90 spray angle. The fine
spray density established by the primary slots is required to start
and run the engine. Higher N1 speeds require additional fuel and a
heavier density spray pattern; therefore, secondary fuel is
introduced through the nozzle at speeds above 32% N1. The secondary
flow enters
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