C.I.MAR.E.    ST. LAWRENCE BRANCH INVITES YOU TO JOIN THEM FOR AN INFORMATIVE WEBINAR

DATE: TUESDAY, March 9th

TIME: 12:00 pm EST (9:00 am PACIFIC, 1:00 pm ATLANTIC, 1:30 pm NFLD)

Impact of Manufacturing Tolerances on Propeller Performance

Background:

Anthropogenic underwater radiated noise is now being recognized as a worldwide problem. For ship speeds greater than about 15 knots, propeller cavitation is the predominant source of propeller-generated underwater noise and vibrations.  Cavitation not only influences propeller-induced pressure fluctuations on ship hulls and increases noise levels in ships, but it also impacts the ocean environment with
underwater noise pollution. Many studies are investigating the effects of propeller design parameters on propeller performance and cavitation. However, there is a critical gap in understanding the impact of manufacturing tolerances on propeller cavitation and to some extent on propulsive performance. This project addresses that gap in knowledge. The primary tools in the investigation is Computational Fluid Dynamics (CFD) methods supported by model experiments to validate their results.

Project Overview:

The project compares “as-built” propeller blade sections with their ideal “asdesigned” counterpart to elucidate the effects of manufacturing defects on cavitation and propulsive performance. The study is investigating the effect of  sharp-edged flat regions near the LE, which are within the tolerances of ISO 484 class S. The project work is organised in three investigations incorporating both CFD simulations and experimental support as follows:

• Investigation 1: 2D foil section investigation in rectilinear flow
• Investigation 2: 3D wing planform investigation in rectilinear flow
• Investigation 3: 3D full propeller (rotating)

Partners:

1. Dominis Engineering: Project lead, managing experimental program manufacturing of models and reporting
2. Memorial University (MUN): CFD modelling
3. DRDC – Atlantic: CFD modelling

The presenter:

Bodo Gospodnetic, Owner of Dominis

Bodo Gospodnetic is a Professional Engineer and Technical Manager with a wide range of experiences in manufacturing and scientific applications. Mr. Gospodnetic is a graduate of Carleton University’s Electrical Engineering Program. In 1985 he founded Dominis Engineering Ltd. with his father, late Dr. Drasko Gospodnetic, Researcher Emeritus of NRC of Canada. Prior to Dominis Engineering he worked on computer applications in the fields of computer communications, radar modelling and image processing. At Dominis Engineering Ltd., Mr Gospodnetic has been involved in the development of new manufacturing processes and CAD/CAM applications for the machining and measurement of propellers and water jet impellers. In 2015, he initiated a research project to determine the impact of manufacturing tolerances on propulsive, cavitation and noise performance of propellers. This is a collaborative research project between Dominis Engineering, DRDC-Atlantic and Memorial University sponsored by Transport Canada Innovation Centre.

C.I.MAR.E.    ST. LAWRENCE BRANCH INVITES YOU TO JOIN THEM FOR AN INFORMATIVE WEBINAR

DATE: TUESDAY, January 12th 

TIME: 12:00 pm EST (9:00 am PACIFIC, 1:00 pm ATLANTIC, 1:30 pm NFLD)

Schoenrock Hydraulik Marine Systems – Access in Motion

Abstract: Water ingress caused by a damage of the ships hull is next to fire the second main threat for the life of crew members of a ship and the vessel itself. To keep the vessel afloat and control the effects of such an ingress is therefore a vital task of ship designer, crew members and finally supplier of equipment against this impact. Integrity stability calculation and damage control can save the vessel against sinking and so the crew of getting into a serious, probably lethal situation. Schoenrock Hydraulik Marine Systems is with their products part of the solution to keep damaged vessels at the water surface and to secure it against a worst-case scenario.

The presentation should give a view to the state-of-the-art technology of modern watertight door systems as well as watertight shell doors and hatches. The focus will be at the sliding door solutions, available drive concepts and actual developments how to get the doors tight up to 50m water column. Finally, some special designs like combined A60 fire rated watertight doors and shock-approved door solutions will be shown.

The presenter:

Dr. Ing. Volker Behrens, Managing Director, Schoenrock Hydraulik Marine Systems

Dr.-Ing. Volker Behrens is working since more than 12 years for Schoenrock. Staying 12 years in the German Navy as a technical and damage control officer and a later position as sales manager for air-conditioning and fire-fighting systems are a perfect background to understand not only the technology of watertight doors and hatches, but also consider the whole aspects of protecting vessels against damages with water ingress.

Presentation by Team Arctic Finland

Date: December 2nd, 2020, at 9:00 am to 11:15 am Eastern

Team Arctic Finland and Embassy of Finland in Ottawa are happy to invite you to join the webinar “Canadian-Finnish cooperation on New Arctic Marine Technologies”. 

Registration is not compulsory, but to enable further networking, you may provide your personal data voluntarily and give your approval to share this data among the webinar participants afterwards.

 You can register yourself here.

You can also forward this invitation within your organization.

The webinar will be organized in Teams. Please use the link below to join the webinar.

For Q&A, please use the Teams chat.

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Should you have any questions, please contact Anu Vaahtera, Project Manager of Team Arctic Finland (email: anu.vaahtera@gaia.fi, SMS or WhatsApp +358 50 563 0326).