Multidisciplinary advanced computations: Fluid dynamics, Aeroacoustics, Structural dynamics (MultFAS)

Purpose and goal

Pupose: to develop and establish the multidisciplinary computational capability wrt fluid-structure interaction (FSI) and its connection to aeroacoustics for complex flow cases. Goal: to apply the developed computational capability for FSI/acoustics in an aeronautical industrial context. FSI simulations have been applied to an internal weapon bay (IWB) as well as to a transonic wing. The interaction between structure vibrations and aeroacoustics has been analyzed for the IWB where modal and non-modal fluid-structure coupling are also compared. Purpose and goal have been met.

Expected effects and result

The project has established advanced computational capabilities for FSI and acoustics for aeronautical applications. With this capability, the project has demonstrated that there is an interaction between the acoustic field inside and around the cavity and the cavity’s structural vibrations. The project has strengthened the industrial design and analysis capabilities. Furthermore, the project has formed a good basis for further industrialization and development of methodology to analyze and design advanced future air vehicles where FSI and acoustics aspects are important.

Planned approach and implementation

The project has been built around the development and evaluation of methods for FSI to analyze the interaction between acoustics and structural vibrations. The project has used aeronautical test cases in the transonic regime; an internal weapon bay (IWB) and a wing. Focus has been on the IWB. The project has been computationally intensive and has required development of used solvers to enable simulations made in the project. The analyzes have a large academic value; detailed and in-depth, and provided a good understanding of physics as well as guidance in similar industrial work.