Calculation on film preparation and film motion of a swirl atomizer
Abstract
A concept for the calculation of basic hydraulic integral variables of a simplex swirl atomizer, such as average mass flow, film thickness, and angle of the hollow conical sheet, is introduced. The conservation of angular and total momemtum is assumed. Total momemtum is described by the Bernouilli equation assuming an inviscid vortex. For vortex flow, in addition to the conservation equations, further stability criteria, needed for an unequivocal solution, are presented. The motion of the hollow conical street was calculated assuming an equilibrium between surface and inertia forces, and using the timeaveraged values of emergence mass flow and film thickness. Possibilities to improve the calculation of return flow swirl atomizers and to consider viscosity effects are indicated.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 May 1987
 Bibcode:
 1987STIN...8816962S
 Keywords:

 Atomizers;
 Computational Fluid Dynamics;
 Fluid Films;
 Swirling;
 Bernoulli Theorem;
 Conservation Equations;
 Flues;
 Inviscid Flow;
 Vortices;
 Fluid Mechanics and Heat Transfer