Conical Two-Phase Swirl Flow Atomizers—Numerical and Experimental Study

Marek Ochowiak, Daniel Janecki, Andżelika Krupińska, Sylwia Włodarczak, Tomasz Wilk and Radosław Olszewski
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Marek Ochowiak: Department of Chemical Engineering and Equipment, Poznan University of Technology, 60-965 Poznan, Poland
Daniel Janecki: Institute of Environmental Engineering and Biotechnology, University of Opole, Kominka 6a, 45-032 Opole, Poland
Andżelika Krupińska: Department of Chemical Engineering and Equipment, Poznan University of Technology, 60-965 Poznan, Poland
Sylwia Włodarczak: Department of Chemical Engineering and Equipment, Poznan University of Technology, 60-965 Poznan, Poland
Tomasz Wilk: Faculty of Chemistry, Adam Mickiewicz University, 61-614 Poznan, Poland
Radosław Olszewski: Faculty of Chemistry, Adam Mickiewicz University, 61-614 Poznan, Poland

Energies, 2021, vol. 14, issue 6, 1-17

Abstract: This paper presents the results of numerical simulations for the developed and discussed conical two-phase atomizers with swirl flow, differing in the ratio of the height of the swirl chamber to its diameter. Experiments were carried out for SAN-1 with H S / D S = 1 and SAN-2 with H S / D S = 4 atomizers. The study was conducted over a range of Reynolds number for liquid Re L = (1400; 5650) and for gas Re G = (2970; 9900). Numerical calculations were performed with the use of computational fluid dynamics (CFD), which were verified on the basis of experimental data. Based on the analysis of experimental studies and simulations results the influence of operational parameters and changes of the atomizer geometry on the generated spray was demonstrated. As the gas flow rate increased and the swirl chamber height decreased, the spray angle increased. Higher velocity values of the liquid and greater turbulence occur in the center of the spray. The flow inside the atomizer determines the nature of the spray obtained. The geometry of the swirl chamber influences the air core formed inside the atomizer, and this determines the atomization effect. The results of numerical simulations not only confirm the results of experimental studies, but also provide additional information on internal and external fluid flow.

Keywords: conical swirl atomizer; atomization; CFD; Eulerian model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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