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International Journal of Fluid Mechanics Research
Главный редактор: Atle Jensen (open in a new tab)
Заместитель главного редактора: Valery Oliynik (open in a new tab)
Редактор-основатель: Victor T. Grinchenko (open in a new tab)

Выходит 6 номеров в год

ISSN Печать: 2152-5102

ISSN Онлайн: 2152-5110

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: 1.1 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: 1.3 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: 0.0002 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: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

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EFFECT OF WINGLET VARIATION ON UAV AERODYNAMIC CHARACTERISTICS

Том 45, Выпуск 6, 2018, pp. 569-577
DOI: 10.1615/InterJFluidMechRes.2018018977
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Краткое описание

Unmanned aerial vehicle (UAV) performance and stability are largely influenced by design, especially with regard to wing surface contour flying characteristics. Appropriate aerodynamic character will improve performance and make for cost-effective fuel consumption and flying stability. One such improvement in aerodynamic character is by the winglet attachment. The proper winglet addition will improve lift and decrease drag and also produce compact endurance due to reductions in the wing tip vortex effect. Therefore, winglet attachment has been widely used in commercial aircraft, but rarely in UAV. This research is about improving aerodynamic performance. Better performance for a longer flying time is the first problem in UAV. Increased flying efficiency is produced by winglet configurations rather than by improving the flying time. The experiment begins with a winglet numerical model to decrease the wing tip vortex effect, followed by an aerodynamic flow visualization. In the model, a winglet attachment shows the wing tip vortex effect. The rounded tapered winglet also significantly increases lift force. The highest flight efficiency point on the graph was reached at a 7.5° angle of attraction.

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