Autors: Panayotov, F. K., Dobrev I., Massouh F., Todorov, M. D.
Title: Numerical Study on the Influence of Wake Contraction on the Computational Accuracy and Rapidity of a Model of a Rotor in Hover
Keywords: model rotor; hover; induced velocity; vortex ring; vortex cylinder; cylindrical wake; contracti ng wake

Abstract: In the present article, the authors are performing a comparison study between two vortex models for the numerical computation of the static thrust of a model helicopter rotor in hover. The aim of this study is to access the rapidity and accuracy of the vortex models, comprised of a series of vortex rings and a single semi-infinite vortex cylinder. The first model has a cylindrical arrangement of the vortex elements, while the second model has a contracting arrangement of its vortex elements. Studies are performed for the optimal positioning and spacing of the vortex elements , in order to provide both rapid computation and good agreement with the experimental data,obtained from a wind tunnel test of the model rotor. The results of the study show a slight increase in the required computational time for the case of the contracting wake, while offering a significantly better accuracy than the cylindrical wake. Another interesting result from the numerical study is that in the rotor.

References

    Issue

    AFASES-2017, May 25-27, 2017, vol. 1, pp. 153-164, 2017, Romania, Air Force Academy "Henri Coanda", DOI: 10.19062/2247 - 3173.2017.19.1.1 6

    Full text of the publication

    Цитирания (Citation/s):
    1. C. Rotaru, J. Tanase, O. Ciuica, E. Mihai, Coaxial Rotor Systems-Characteristics and Performances, Scientific Research and Educational in the Air Force – AFASES 2018, pp.233-238 (index EBSCO, Copernicus, Google Academic) - 2018 - от чужди автори в чужди издания, неиндексирани в Scopus или Web of Science
    2. C. Rotaru1 and R.-V. Mihai, Aspects regarding helicopter capabilities and performance evaluation, AIP Conference Proceedings 2116, 360004 (2019); https://doi.org/10.1063/1.5114364 (index SCOPUS) - 2019 - в издания, индексирани в Scopus или Web of Science

    Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Google Scholar