Numerical investigations on unsteady vortical flows and separation-induced transition over a cycloidal rotor at low Reynolds number
نویسندگان
چکیده
The unsteady vortical flows and separation-induced transition over a 2-bladed cycloidal rotor are investigated numerically at two advance coefficients, with special emphasis on the influence of different turbulence models, namely original SST k-? model ?-Re?t model. Firstly, applicability in predicting transitional single airfoil incidences is evaluated, main results show good agreement experiments, terms mean pressure coefficients locations. Then, global performance detailed internal flow structures also used to compare existing numerical experimental data. primary that increasing advanced coefficient can’t change location blade, but magnitudes these variables (vertical force, propulsive force power coefficients). combining forces (lift drag) acting blades, blade loadings near-wall flows, difference vertical rotating system clarified clearly for models. Finally, advancing side, its evolution elaborated. It shows superior overall performance, highly subjected disturbances, characterized by large-scale vortex massive separation, compared Simultaneously, it has capability capture process, from growing waves laminar boundary layer induced roll-up vortices fully generation separation bubble. believes this work can deepen understandings underlying physics inside low Reynolds number.
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ژورنال
عنوان ژورنال: Energy Conversion and Management
سال: 2022
ISSN: ['0196-8904', '1879-2227']
DOI: https://doi.org/10.1016/j.enconman.2022.115812