Abstract: A Ballistic Modeling (BM) /
Discrete Droplet Modeling (DDM) method is used to determine the
characteristics of a solid cone pressure-swirl atomizer (Dyna
Coin nozzle). The characteristic of its liquid spray is of
considerable importance to the operation and performance of
combustion systems. A two-dimensional spray model has been
developed to simulate a continuous spray under steady-state
condition. This model can simulate the resultant drop-size of
atomization and reveal the effects of the important physical
variables such as fuel injection pressure, air pressure (or
density), co-axial air flow and fuel properties on the result of
atomization process. Dimensional analysis is used to simulate
the drop-size immediately after jet breakup and further breakup
of the droplets is determined by testifying the critical
condition of aerodynamics breakup i.e.(Wed)c=8/CD.
Key words:
Pressure-swirl atomizer Model Droplet size
Manuscript received on
January 16,1996; revised manuscript February 2, 1996
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