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Journal of Flow Visualization and Image Processing

Publicado 4 números por año

ISSN Imprimir: 1065-3090

ISSN En Línea: 1940-4336

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: 0.6 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: 0.6 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: 0.00013 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: 0.14 SJR: 0.201 SNIP: 0.313 CiteScore™:: 1.2 H-Index: 13

Indexed in

INVESTIGATION OF FLOW OVER NACA0021 AIRFOIL WITH LEADING-EDGE TUBERCLES USING TRANSITION-BASED HYBRID RANS/LES MODEL

Volumen 30, Edición 1, 2023, pp. 1-36
DOI: 10.1615/JFlowVisImageProc.2022040289
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SINOPSIS

The present paper numerically investigates flow control over NACA0021 airfoils by applying a leading-edge tubercle to improve wind turbine performance at a transitional Reynolds number (Re) regime. The study includes simulations over the unmodified airfoil and modified airfoil operating at Re = 120,000 using a kT-kL-ω based delayed detached eddy simulation model. The calculations include both the prestall and poststall regions, while the performance of the mean flow aerodynamic properties, such as pressure, lift, skin-friction, and drag coefficients, is also investigated in the presence of tubercles. The spanwise flow over the modified airfoil interacts with the primary flow. The turbulent separation is delayed compared to the unmodified airfoil, thereby significantly improving the stall behavior and flow behavior in the poststall region. The modified airfoil provides the gradual stall behavior against the steep stall behavior for the unmodified airfoil. To optimize the tubercle configuration, the study considers two modified airfoils with different combinations of amplitude and wavelength. The unsteady analysis, including the reduced-order modeling, i.e., 3D proper orthogonal decomposition (POD), characterizes the dominant vortical structure of the flow to evaluate the improvement in the aerodynamic performance of the modified airfoil. The model decomposition for flow over the airfoil helps to provide a deeper understanding of the flow control phenomenon.

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