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CAPEM (Conformal Array Performance Estimation Modelling)

Hydrophones used in passive and active sonars of marine vehicles are mounted inside domes in order to reduce the influence of flow induced noise that originates from vibration caused by the fluctuating boundary layer. Flow induced self-noise can significantly degrade the sensor sensitivity, and understanding self-noise generation mechanisms potentially makes it possible to reduce the noise levels and thereby enhance the sensor performance.
Organismi finanziatori: 
European Defence Agency
Durata prevista: 
Data di inizio: 
Copertura dei costi: 

Partners:  FFI (NO), Fugro Geoteam (NO), WTD71-FWG (DE), ATLAS (DE), INSEAN (IT), FAU (DE)
Steering Committee: the Navies of Norway, Germany, and Italy.

The focus of the project is related to the capability of predicting the noise caused by structural vibration associated with the fluctuating boundary layer at different speeds, for different dome materials and dome sonar structures. The overall objective is to develop tools for the development of conformal arrays, and to verify modelling methodologies that can be used to improve sonar performance. This can be reached via modelling the fluctuating boundary layer and the hydro-acoustical wave field generated by the boundary layer and the associated structural vibrations. Experimental validation of modelling results, and a comparison between laboratory experiments, numerical computations and field experiments with a towed body will be carried out.

Entrate totali (INSEAN):