The preliminary design of a scaled Composite UHBR Fan for a wind tunnel test campaign

AbstractThe ambition of the CA3ViAR project is to design an open test case fan that experiences instability mechanisms, which are representative for ultra-high bypass ratio (UHBR) fans of civil aircrafts, and to perform a comprehensive experimental investigation to measure aerodynamic, aeroelastic and aeroacoustic performance in a wide range of operational conditions. Experimental tests will be performed in the Propulsion-Test-Facility (PTF) of the Institute of Jet Propulsion and Turbomachinery (IFAS) of Technische Universität Braunschweig, Germany. The final objective of the project is to provide an open test case for the entire research community, with geometries, numerical and experimental results to establish a new reference for composite UHBR fan design. This will support the development of new methods and tools for the development of safer, lighter and more efficient composite fans for greener UHBR engines. In this work the preliminary design of the low transonic fan (LTF) to be used as test article, whose main requirement is to be operated in a safe and controlled way in conditions of aerodynamic and/or aeroelastic instability during wind tunnel operations, is presented. More in particular, consolidated aerodynamic design, strategy adopted to drive the structural design, flutter analysis taking into account acoustic reflection at the intake, dynamic and stress analyses, as well as aeroacoustic measurement optimization are presented and discussed. The preliminary mechanical design of composite blades and the rotor hub, together with the rotor instrumentation and related studies to embed sensors in the composite blades, are also part of this article, and complemented by manufacturing trials and demonstration tests give the full picture of all the project activities up to the preliminary design review

Recovery of oil-pollutant from shipwrecks: DIFIS project

Purpose – A method for the prompt intervention and remediation of tanker wrecks, for recovering the fuel trapped in their tanks is described in the present work. Design/methodology/approach – The environmental conditions, the functional specifications, the conceptual and preliminary design, the computational methods (Fluid/Structure Interaction, Computational Fluid Dynamics analysis and Finite Element Analysis), the hydrodynamic scale model tests and the dynamic response analysis are included in this research paper. Findings – The paper provides analytical and numerical tools for the response of subsea structures. These tools were calibrated by hydrodynamic scale model tests and extrapolated for different depths (shallow, deep water and ultra deep water). Research limitations/implications– The method is applicable as long as the trapped pollutant does not dissolve and is of lower density than the sea water. Originality/value – This paper presents a new structure for the oil recovery from shipwrecks which is simple and quickly deployed.JRC.G.7-Digital Citizen Securit

MIFIS CONCEPT: A PRINCIPAL INVESTIGATION FOR BLOW-OUT RECOVERY

In the present work, a method for the prompt and remediation of offshore Blowouts and seabed hydrates’ intervention is presented. The method is a modified version of DIFIS System, an EU FP6 proposed solution for the oil recovery from tankers wreck. It relies on gravity to channel the blow-out mixture towards the surface. Two (2) components are used for the oil/water/gas separation (PG-BBS) and oil/water storage (BB). These components are placed a 300 m and 30 meters below the sea surface respectively, unaffected by the weather conditions. This is achieved by a quickly deployable flexible structure (MIFIS) that should stay in place until the well is emptied or appropriate sealed in order to eliminate the pollution threat. The PG-BBS and BB reservoirs are provided with standard equipment through which shuttle vessels can recover the oil and gas rapidly, using standard offshore/subsea equipment. As an innovative system, the principal investigation (operational environment, system components’ description, structural requirements/specifications, design guidelines) was carried out. The parameters were used for the Technical Feasibility study where the concept was evaluated. The final results can be used for the implementation of new innovative research projects and solutions in Offshore/Subsea industry