Abo Bibliothek: Guest
Atomization and Sprays

Erscheint 12 Ausgaben pro Jahr

ISSN Druckformat: 1044-5110

ISSN Online: 1936-2684

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00095 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

Indexed in

EMBEDDED DNS CONCEPT FOR SIMULATING THE PRIMARY BREAKUP OF AN AIRBLAST ATOMIZER

Volumen 26, Ausgabe 3, 2016, pp. 187-215
DOI: 10.1615/AtomizSpr.2014011019
Get accessGet access

ABSTRAKT

The primary breakup represents the initial step of the liquid atomization process and is still not well understood. Prefilming airblast atomizers are utilized in aircraft engines to atomize the liquid fuel. The geometries of airblast atomizers are complex; the operating conditions are characterized by high Reynolds and Weber numbers. The investigation of airblasted sheets lack experimental data due to the limited accessibility of the prefilmer geometry. Numerical experiments represent an alternative. This paper introduces the embedded direct numerical simulation (DNS) concept that aims to fill this gap. The concept consists of three steps: a geometry simplification, the generation of inflow boundary conditions for the embedded domain, and the two-phase flow DNS of the breakup region. The annular airblast atomizer geometry is simplified to a planar configuration. A zonal large eddy simulation of the turbulent channel flow is performed prior to the DNS. The inflow paramters are mapped to the inlet of the embedded domain. The results from the turbulent channel flow computations illustrate a good agreement with DNS data. The primary breakup of an airblasted sheet is simulated by using the volume-of-fluid method. Two different grid resolutions are utilized. Qualitative studies show a good agreement of the liquid deformations and the dominant primary atomization mechanism with experimental results. Quantitative results discuss the resulting droplet distributions, the grid resolutions related to the representation of small structures and turbulence, and the breakup length and time scales. It is confirmed that the fine grid improves the resolution of small droplets due to the further breakup of already separated structures. The majority of the liquid mass instead is associated with the irregular appearing large scales, which are already resolved using the coarse grid. This paper proves the applicability of the embedded DNS approach for understanding the primary breakup of prefilming airblast atomizers.

REFERENZIERT VON
  1. Warncke K., Gepperth S., Sauer B., Sadiki A., Janicka J., Koch R., Bauer H.-J., Experimental and numerical investigation of the primary breakup of an airblasted liquid sheet, International Journal of Multiphase Flow, 91, 2017. Crossref

  2. Braun Samuel, Wieth Lars, Holz Simon, Dauch Thilo F., Keller Marc C., Chaussonnet Geoffroy, Gepperth Sebastian, Koch Rainer, Bauer Hans-Jörg, Numerical prediction of air-assisted primary atomization using Smoothed Particle Hydrodynamics, International Journal of Multiphase Flow, 114, 2019. Crossref

  3. Driscoll James F., Chen Jacqueline H., Skiba Aaron W., Carter Campbell D., Hawkes Evatt R., Wang Haiou, Premixed flames subjected to extreme turbulence: Some questions and recent answers, Progress in Energy and Combustion Science, 76, 2020. Crossref

  4. Giusti A., Mastorakos E., Turbulent Combustion Modelling and Experiments: Recent Trends and Developments, Flow, Turbulence and Combustion, 103, 4, 2019. Crossref

  5. Dauch T. F., Chaussonnet G., Keller M. C., Okraschevski M., Ates C., Koch R., Bauer H.-J., 3D Predictions of the Primary Breakup of Fuel in Spray Nozzles for Aero Engines, in High Performance Computing in Science and Engineering '20, 2021. Crossref

  6. Asuri Mukundan Anirudh, Ménard Thibaut, Brändle de Motta Jorge César, Berlemont Alain, Detailed numerical simulations of primary atomization of airblasted liquid sheet, International Journal of Multiphase Flow, 147, 2022. Crossref

  7. Palanti L., Puggelli S., Langone L., Andreini A., Reveillon J., Duret B., Demoulin F.X., An attempt to predict spray characteristics at early stage of the atomization process by using surface density and curvature distribution, International Journal of Multiphase Flow, 147, 2022. Crossref

  8. An Xiang, Dong Bo, Zhang Yajin, Wang Yong, Zhou Xun, Li Weizhong, Influence of the wettability on the liquid breakup in planar prefilming airblast atomization using a coupled lattice Boltzmann–large eddy simulation model, Physics of Fluids, 34, 5, 2022. Crossref

Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen Preise und Aborichtlinien Begell House Kontakt Language English 中文 Русский Português German French Spain