Start Date

2018 11:55 AM

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Abstract

In the design of shipping locks, an accurate prediction of the force on a vessel during levelling is required to ensure a safe but swift operation of the future lock. This force is often predicted by distinguishing several force mechanisms, of which the translatory wave, filling jet and density current are generally most important. The present study focusses on the interaction of the filling jet with the ship and aims at understanding how the ship changes the flow pattern and how, consequently, this flow results in a force on the ship. To this end, scale model measurements are performed in a flume with a schematized lock and ship geometry. In addition to measuring the forces on the ship, the flow pattern has been measured using PIV (particle image velocimetry) measurements. The various tests include a variation of keel clearance and distance between the ship and the lock’s gates. The results present a detailed view of the flow pattern in the ship’s vicinity. The measured forces are compared to Lockfill and show good agreement despite the simplifications that have been made.

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May 17th, 11:55 AM

The Interaction of a Lock’s Filling Jet and the Ship in the Lock Chamber, Using Scale Model Measurements

In the design of shipping locks, an accurate prediction of the force on a vessel during levelling is required to ensure a safe but swift operation of the future lock. This force is often predicted by distinguishing several force mechanisms, of which the translatory wave, filling jet and density current are generally most important. The present study focusses on the interaction of the filling jet with the ship and aims at understanding how the ship changes the flow pattern and how, consequently, this flow results in a force on the ship. To this end, scale model measurements are performed in a flume with a schematized lock and ship geometry. In addition to measuring the forces on the ship, the flow pattern has been measured using PIV (particle image velocimetry) measurements. The various tests include a variation of keel clearance and distance between the ship and the lock’s gates. The results present a detailed view of the flow pattern in the ship’s vicinity. The measured forces are compared to Lockfill and show good agreement despite the simplifications that have been made.