Abrégé

A method for providing a hull of a vessel with bubble generators for reducing the drag of the hull includes providing at least one elongated slot in the hull, the slot having a length extending in a lateral direction of the vessel and a width extending perpendicular thereto; providing a multitude of bubble generator units, each having an inlet opening for supplying air and a bottom surface with at least one outlet opening for discharging air bubbles; and mounting the multitude of bubble generator units in the slot in a side by side manner along the length of the slot such that the slot is filled and substantially closed off by the bubble generator units, and such that the inlet openings of the bubble generator units face the interior of the hull and the bottom surfaces with the outlet openings of the bubble generator units face the exterior of the hull.

Classes IPC  ?

• B63B 1/38 - Autres moyens pour faire varier les caractéristiques hydrodynamiques inhérentes aux coques par réduction du frottement utilisant des bulles d'air ou des coussins d'air

Abrégé

A device for reducing underwater sound energy and propagation, whereby the device includes at least one bubble generation unit and an air conduit for supplying pressurized air to the bubble generation unit, whereby the bubble generation unit has a fluidic oscillator for generating one or more pulsating air flows from a constant air flow, and whereby preferably the fluidic oscillator has an adjustable oscillation frequency, and a method for using such a device for reducing underwater sound propagation, whereby the air conduit and the bubble generation unit are placed underwater, whereby pressurized air is supplied to the air conduit and whereby air bubbles are generated by the bubble generation unit.

Classes IPC  ?

• E02D 13/00 - Accessoires pour la mise en place ou l'enlèvement de pieux ou de rideaux de palplanches
• G10K 11/16 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général

Abrégé

A method for providing a hull of a vessel with bubble generators for reducing the drag of the hull, wherein said method comprises the following steps: providing at least one elongated slot in the hull, said slot having a length extending in a lateral direction of the vessel and a width extending perpendicular thereto; providing a multitude of bubble generator units, each having an inlet opening for supplying air and a bottom surface with at least one outlet opening for discharging air bubbles; and mounting said multitude of bubble generator units in said slot in a side by side manner along the length of said slot such that said slot is filled and substantially closed off by said bubble generator units, and such that said inlet openings of said bubble generator units face the interior of the hull and the bottom surfaces with the outlet openings of said bubble generator units face the exterior of the hull.

Classes IPC  ?

• B63B 1/38 - Autres moyens pour faire varier les caractéristiques hydrodynamiques inhérentes aux coques par réduction du frottement utilisant des bulles d'air ou des coussins d'air
• B63B 83/00 - Reconstruction ou remise à niveau de navires, p. ex. remise à niveau des systèmes de traitement de l’eau de ballast
• B63B 83/30 - Reconstruction ou remise à niveau de navires, p. ex. remise à niveau des systèmes de traitement de l’eau de ballast pour améliorer l’efficacité énergétique, p. ex. en améliorant l’hydrodynamique ou l’installation de production d'énergie

Abrégé

A belt for reducing the drag of a hull of a floating vessel, whereby the belt includes a belt body extending in a length direction (L), whereby the belt has, a sequence of bubble generators which are embedded in the belt body, whereby the belt has an air channel for supplying pressurized air to the bubble generators, whereby the air channel extends in the length direction (L), whereby the bubble generators are connected to the air channel, whereby the belt body is made of a flexible material. Also disclosed is a device having such a belt and a method of reducing the drag of a hull of a floating vessel using such a belt.

Classes IPC  ?

• B63B 1/38 - Autres moyens pour faire varier les caractéristiques hydrodynamiques inhérentes aux coques par réduction du frottement utilisant des bulles d'air ou des coussins d'air

Abrégé

Disclosed is an apparatus for generating bubbles for reducing drag on a hull of a ship, wherein the bubble generating device is attachable to an outer surface of the hull, and wherein the apparatus comprises one or more microfluidic device for controlling a bubble size of the generated bubbles.

Classes IPC  ?

• B63B 1/38 - Autres moyens pour faire varier les caractéristiques hydrodynamiques inhérentes aux coques par réduction du frottement utilisant des bulles d'air ou des coussins d'air