Experimental Study of a Tanker Ship Squat in Shallow Water

Authors

  • Mohammadreza Fathi Kazerooni Center of Excellence in Hydrodynamics & Dynamics of Marine Vehicles, Sharif University of Technology,Tehran, Iran
  • Mohammad Saeed Seif Center of Excellence in Hydrodynamics & Dynamics of Marine Vehicles, Sharif University of Technology,Tehran, Iran

DOI:

https://doi.org/10.11113/jt.v66.2477

Keywords:

Ship, squat, shallow fairway, model test, towing tank

Abstract

One of the phenomena restricting the tanker navigation in shallow waters is reduction of under keel clearance in the terms of sinkage and dynamic trim that is called squatting. According to the complexity of flow around ship hull, one of the best methods to predict the ship squat is experimental approach based on model tests in the towing tank. In this study model tests for tanker ship model had been held in the towing tank and squat of the model are measured and analyzed. Based on experimental results suitable formulae for prediction of these types of ship squat in fairways are obtained.

References

Admiralty Manual of Navigation. 1987. HMSO. 1.

Ankudinov, V., Dagget, J. C., 1996. Squat Prediction for Ship Maneuvering Applications. Proceedings International Conference on Marine Simulation and Ship Maneuverability. Denmark, Copenhagen. 9–13

Ankudinov, V., Larry, L., Dagget, J. C., 2000. Prototype Measurement of Ship Sinkage in Confined Waters. Proceedings International Conference on Marine Simulation and Ship Maneuverability, Orlando. May 8–12.

Barras, C. B. 2000. Ship Stability for Masters & Mates. Elsevier Science

Brix. H. 1994. Maneuvering Technical Manual. Hamburg University Press

Dufflied R. J. 1997. Investigation Into Steady and Unsteady State Squat. Naval Architecture Bachelor Thesis, Australian Maritime College.

Eryuzlu, N. E., Hausser, R. 1978. Experimental Investigation Into Some Aspects of Large Vessel Navigation in Restricted Waterways. Proceedings of Symposium of Aspects of Navigability of Constraint Waterways Including Harbor Entrances. 2: 1–15

Gourlay, T. 2006. Flow Beneath a Ship at Small Underkeel Clearance. Journal of Ship Research. 50: 250–2258.

Gourlay, T. 2008. Slender Body Methods for Predicting Ship Squat. Ocean Engineering. 35: 191–200.

Gucma. L., Schoeneich, M. 2009. Monte Carlo Method of Ships Under Keel Clearance Evaluation for Safety of Ferry Approaching to Ystad Port Determination, R&RATA#. 2(13): 2.

Alexander Harting, Anne Laupichler, Jorge Reinking. 2009. Considerations on the Squat of Unevenly Trimmed Ships. Ocean Engineering. 36: 193–201.

Milward, A. 1996. Review of Prediction of Ship Squat in Shallow Waters. Journal of Navigation. 49: 77–88.

Norrbin, N. H. 1978. Fairway Design with Respect to Ship Dynamics and Operational Requirements, Swedish State Shipbuilding Tank (SSPA) Research Report No.102, Gothenburg, Sweden.

Tuck, E. O. 1966. Shallow Water Flows Past Slender Bodies. Journal of Fluid Mechanics. 26: 81.

Varyani, K. S. 2006. Squat Effects on High Speed Craft In Restricted Waterway. Ocean Engineering. 33: 365–381.

White, F. M. 2002. Fluid Mechanics. Mc Grew Hills.

Yang, C., Lohner, R., Noblesse, F., Huang, T. 2000. Calculation of Ship Sinkage and Trim Using Unstructured Grid. European Congress on Computational Methods in Applied Sciences & Engineering. ECCOMAS 20.

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Published

2014-01-01

Issue

Section

Science and Engineering

How to Cite

Experimental Study of a Tanker Ship Squat in Shallow Water. (2014). Jurnal Teknologi (Sciences & Engineering), 66(2). https://doi.org/10.11113/jt.v66.2477