A Comparative Study of Different Modeling Tools and Analysis Techniques for Aeroelastic Stability Assessment

Modern simulation and analysis tools rely on assumptions and numerical schemes that inevitably affect their outputs, leading to uncertainties and biases that must be quantified and bounded, especially when they influence critical aspects such as system stability. This paper presents recent results from an aeroelastic benchmark on a reference 15-MW wind turbine, conducted by multiple partners within the framework of the International Energy Agency (IEA) Wind TCP Task 47 TURBINIA, focusing on stability characteristics and aeroelastic responses. The agreement among the results is reasonably good, although some quantities exhibit a significant spread. This is particularly evident in the damping factors of the turbine modes and in the periodic loads observed under sheared conditions.