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An improved theoretical formulation for Sauter mean diameter of pressure-swirl atomizers using geometrical parameters of atomization

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Propulsion and Power Research 2022年第2期11卷 240-252页

作者： Julio R.Ronceros Rivas Amilcar Porto Pimenta jusceline sumara lessa Gustavo A.Ronceros Rivas Department of Mechatronics Engineering of Universidad Peruana de Ciencias Aplicadas(UPC) Campus MonterricoAv.Prolongación Primavera 2390SurcoLimaLima 33Peru Department of Propulsion and Energy of Instituto Tecnológico de Aeronáutica(ITA) Comando Geral de Tecnologia AeroespacialPraça Marechal Eduardo Gomes 50Vila das AcaciasSão Josédos CamposSP 12228900Brazil Interdisciplinary Master and Doctoral Degrees in Energy and Sustainability(PPGIES)of Federal University of Latin American Integration(UNILA) Foz do IguaçuParaná85867900Brazil

This study discusses the development of a mathematical model that is capable ofpredicting the drop size mean diameter of the spray generated by a pressure swirl atomizer,considering the effects of the liquid’s viscosity and the geometrical parameters of this typeof injector, as well as the angle of incidence of the inlet channels (j and b) and atomizationparameters (k, 8), obtained from hyperbolic relations. Additionally, this model investigatesthe phenomena of rupture and stability that are observed in the conical liquid film, in whichthe importance of a new geometrical parameter of atomization, “8”, which immediately influences the drop size diameter of the spray, should be highlighted. The results that are obtainedusing this model are compared with analytical results of Couto, Wang and Lefebvre, Jasuja,Radcliffe and Lefebvre, experimental results and numerics (Hollow cone atomization model),using the Ansys Fluent software for the validation and consistency of the model proposed in Rivas (2015). This model yields good approximations as compared to that yielded using otheralternative mathematical models, demonstrating that the new atomization geometric parameter“8” is an “adjustment” factor that exhibits considerable significance while designing pressureswirl atomizers according to the required SMD. Furthermore, this model is easy to use, withreliable results, and has the advantage of saving computational time.

关键词： Atomization mathematical model Drop size mean diameter Pressure-swirl atomizer Atomization geometric parameter 8 Half spray angle Helix angle

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