The session deals with aerodynamics, in particular computational aerodynamics. The session investigates a typical enginering blade element momentum (BEM) aerodynamic model, and demonstrates the merits of less empiric but computationally more comprehensive CFD modelling for yawed conditions and for tip vortex breakdown. We will also discuss the validation by 2D wind tunnel tests for high Reynolds numbers and how to use aerodynamics computations to analyse the effect of protuberances on blades.

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Learning objectives

• Understand and assess the limitations of engineering computational aerodynamics tools versus CFD;
• Understand opportunities and challenges of using CFD for aerodynamic computations;
• Understand uncertainties of wind tunnel tests for validation of computational eaerodynamics;
• Understand how protuberances on blades may affect performance.