All you need is time to generalise the Goman–Khrabrov dynamic stall model

نویسندگان

چکیده

Dynamic stall on airfoils negatively impacts their aerodynamic performance and can lead to structural damage. Accurate prediction modelling of the dynamic loads are crucial for a more robust design wings blades that operate under unsteady conditions susceptible widening range operation these lifting surfaces. Many models rely empirical parameters need be obtained from experimental or numerical data which limits generalisability. Here, we introduce physically derived times scales replace in Goman-Khrabrov model. The physics-based time constants correspond delay decay rate post-stall load fluctuations. is largely independent type motion, Reynolds number, airfoil geometry described as function normalised instantaneous pitch rate. motion kinematics directly related Strouhal number vortex shedding. general validity our demonstrated using three sets covering various profiles, numbers varying 75'000 1'000'000, sinusoidal ramp-up pitching motions. use generalises model extends its application.

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ژورنال

عنوان ژورنال: Journal of Fluid Mechanics

سال: 2022

ISSN: ['0022-1120', '1469-7645']

DOI: https://doi.org/10.1017/jfm.2022.381