The brownout dust clouds that surround the helicopter operating in dusty conditions consist of an enormous number of particles, leading to lower visibility and piloting difficulties. The computational cost of tracking all particles is intolerable, while the solutions with insufficient numbers of particles often fail to achieve enough fidelity. This research proposes a finite particle approach for high-fidelity simulation on helicopter brownout, providing particle number concentration distributions to quantitatively evaluate the risk of dust clouds. Based on the summarization of criteria for counting particle number concentration, the total number of particles in the calculation is presented to balance fidelity and efficiency. According to the entrainment model results, only a finite number of particles are injected into the flow to improve computational efficiency. The trajectories of injected particles are reconstructed for high-fidelity results. Combining the Richardson extrapolation and the assessment of average particle spacings, the total number of particles in the calculation is recommended to be 10 8 . The finite particle approach is adopted to investigate dust clouds in various flight conditions. Numerical results demonstrate that, compared to hovering, the maximum value of particle number concentration is greater and closer to the rotor center when flying with a low advance ratio.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Finite Particle Approach for High-Fidelity Simulation on Helicopter Brownout


    Beteiligte:
    Lin, Hongyuan (Autor:in) / Xu, Chenhao (Autor:in) / Jiang, Chongwen (Autor:in) / Hu, Shuyao (Autor:in) / Lee, Chun-Hian (Autor:in)

    Erschienen in:

    AIAA Journal ; 62 , 1 ; 193-208


    Erscheinungsdatum :

    2023-09-29


    Format / Umfang :

    16 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Solutions Analysis for Helicopter Brownout

    L. Anderson / P. Doty / M. Griego et al. | NTIS | 2006


    The Flow Physics of Helicopter Brownout

    Phillips, C. / Kim, H.W. / Brown, R.E. et al. | British Library Conference Proceedings | 2010


    Helicopter brownout — Can it be modelled?

    Phillips, C | Online Contents | 2011


    Eulerian Simulation of the Fluid Dynamics of Helicopter Brownout

    Phillips, C. / Brown, R. / AHS International | British Library Conference Proceedings | 2008