WEBINAR: Reducing Resistance - Air Lubrication and Propeller Efficiency
The first part of this lecture delves into the theoretical background of the Damen Air Cavity System (DACS), which forms stable air cavities on the flat bottom of a ship to reduce it's wetted area and consequently it's resistance, lowering fuel/energy consumption and emissions. The concept, originating from a research project at Delft University of Technology (TU Delft) in the Netherlands, demonstrates high overall efficiency, contributing significantly to the reduction of fuel consumption and emissions. The presentation will share experimental results from laboratory tests, and highlight outcomes from the full-scale application.
The second half of this webinar sheds light on the intricacies of a groundbreaking Experimental Fluid Dynamics (EFD) method to visualise propeller boundary layer flow, from Marin. Maarten Kerkvliet and Bart Schuiling conducted a long study to solve the problem of laminar boundary layers on propellers. To do this they used paint, refined Computational Fluid Dynamics (CFD) simulations, and developed an innovative approach to stimulate turbulence in propeller models. These advancements are not just academic; they promise practical improvements in maritime model testing.
About the Speakers
Sasha (Oleksandr) Zverkhovskyi currently holds the position of a Design and Development engineer at Damen Shipyards. He is mainly responsible for the implementation and further development of Damen Air Cavity System. From 2015 to 2023 Sasha was a R&D engineer at Damen working on the research and development projects related to the ship hydrodynamics. Before joining Damen he worked for two years as a researcher at the Maritime Research Institute of the Netherlands. Sasha obtained his PhD degree from Delft University of Technology in 2014.
Bart Schuiling is a Senior Researcher at MARIN, where he has been advancing the field of fluid mechanics for the past 14 years. His academic background is in Mechanical Engineering, with a specialized Masters in Fluid Mechanics which he followed at the University of Twente. His career began at MARIN with a strong focus on Computational Fluid Dynamics. He has dedicated much of my work to propulsion performance optimization, the development and analysis of Energy Saving Devices, and the integration of machine learning techniques to enhance our understanding and efficiency in these areas.
Maarten Kerkvliet is currently a Senior Researcher and part of the Propulsion and Operational Performance team. He is one of the developers of MARIN's Computational Fluid Dynamics (CFD) software package ReFRESCO. His primary area of expertise is turbulence, transition and roughness modelling and the design and implementation of complex challenging CFD problems. Over the past five years, however, he has also delved into experimental work within the same domain to improve both numerical models and model-scale experiments.
