Abstract
AbstractThe pollutant emissions of aircraft engines are strongly affected by the fuel injection into the combustion chamber. Hence, the precise description of the fuel spray is required in order to predict these emissions more reliably. The characteristics of a spray is determined during the atomization process, especially during primary breakup in the vicinity of the atomizer nozzle. Currently, Euler-Lagrangian approaches are used to predict the droplet trajectories in combustor simulations along with reaction and pollutant formation models. To be able to reliably predict pollutant emissions in the future, well-defined starting conditions of the liquid fuel droplets close to the atomizer nozzle are necessary. In the present work, Euler-Lagrangian simulations of a generic airblast atomizer are presented. The starting conditions of the droplets are varied in the simulations by means of a primary breakup model, which takes into account the local gas velocity when predicting the droplet diameter. The objective of this work is to determine the optimal parameters of the probability density functions for the starting position and the starting velocity of the droplets. Spray properties observed in the simulations are used to qualitatively evaluate the major effects of the distribution parameters on the spray and the suitability of the primary breakup model being applied. Hence, the spatial distribution of an experimental spray can be reproduced using a statistical model for the droplet starting conditions.
Publisher
Springer Science and Business Media LLC
Subject
Aerospace Engineering,Transportation
Reference36 articles.
1. ACARE: Aeronautics and air transport: beyond vision 2020 (towards 2050). The Advisory Council for Aeronautics Research in Europe - Strategy Review Group, European Commission (2010)
2. Lefebvre, A.H., Ballal, D.R.: Gas turbine combustion: alternative fuels and emissions, 3rd edn. CRC Press, Taylor & Francis Group, Boca Raton (2010)
3. Lefebvre, A.H.: Fifty years of gas turbine fuel injection. Atomiz. Sprays 10(3–5), 251–276 (2000). https://doi.org/10.1615/AtomizSpr.v10.i3-5.40
4. Liao, Y., Jeng, S.M., Jog, M.A., Benjamin, M.A.: Advanced sub-model for airblast atomizers. J. Propul. Power 17(2), 411–417 (2001). https://doi.org/10.2514/2.5757
5. Sattelmayer, T., Wittig, S.: Internal flow effects in prefilming airblast atomizers: mechanisms of atomization and droplet spectra. J. Eng. Gas Turbines Power 108(3), 465–472 (1986). https://doi.org/10.1115/1.3239931
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献