State-Space Model and Simulation for Dynamic Stall

Abstract:

Because of the complexity of the progress of dynamic stall, the characteristic of dynamic stall of airfoil is always the difficulty of aerodynamics. A time-domain model has been formulated to represent the unsteady lift and pitching moment characteristics of a two-dimensional airfoil undergoing attached-flow conditions in a compressible flow and dynamic stall. The model is given as a set of first order differential state equations. The Beddoes-Leishman model was presented through modeling the effects of attached flow, separated flow and dynamic stall in the paper. A modified method is presented which includes a new stall-onset criterion and improves the position and separation conditions of the leading edge vortex, so that the B-L model is adaptive for lower Mach numbers. Then, the normal force and pitching moment on NACA0012 airfoil was calculated and compared with available experimental data to validate the reliability of the model.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 2258-2263
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.2258
• Online since: July 2014
• Authors: Wei Dong Lei*, Guo Cai Hu, Quan Liu
• Keywords: Beddoes-Leishman Model, Dynamic Stall, State-Space Equations, Unsteady Aerodynamics

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