Wake survey of an impinging swirling jet by pressure and dynamometric measurements and high-speed visualizations

As a result of the INSEAN activity in the framework of the Workpackage 2se of the EU-funded "Swirl-Jet Study" Research Project, the present Report describes the aspects concerning the design and construction of the ducted propeller system, as well as the first stage of the experimental activity for the qualification of the swirling jet. More specifically the Report is arranged according to the following scheme: 1. design and construction of the seabed excavation ducted propeller model; 2. measurement of the performance at different operating conditions; 3. wall pressure measurements; 4. visualizations of the jet behaviour. Aims of this experimental activity are to get a preliminary assessment of the behaviour of the swirling jet and to provide recommendations regarding the follow-up test program in Workpackages 4se and 5se.