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Speed and Power Prediction Techniques for High Block Ships Applied in Nagasaki Experimental Tank.

PB251430

Publication Date	1976
Personal Author	Tamura, K.
Page Count	16
Abstract	The model-ship correlation method applied in the Nagasaki Experimental Tank, MHI and its historical background are described. The method, which belongs to the category of theoretical methods, has been used for speed and power prediction of various kinds of ships during these twenty years. The difficulty in power prediction caused by the rapid expansion in size and block coefficient has been overcome by the introduction of a three-dimensional extrapolation method in place of the two-dimensional one, without making any serious misleading prediction. For the current high block ships, it is essential to distinguish the type of flow pattern, around the stern of the model since two kinds of flow pattern exist. The method used to distinguish the flow in model and its influence on model-ship correlation are discussed.
Keywords	Ship models Model tests Predictions Velocity Marine surface propulsion Correlation Wakes Hydrodynamics Model basins Tanker ships Marine propellers Japan High block ships
Source Agency	Mitsubishi Heavy Industries
NTIS Subject Category	47A - Marine Engineering 46B - Fluid Mechanics
Corporate Authors	Mitsubishi Heavy Industries Ltd., Tokyo (Japan).
Document Type	Technical Report
NTIS Issue Number	197612

Speed and Power Prediction Techniques for High Block Ships Applied in Nagasaki Experimental Tank.

Speed and Power Prediction Techniques for High Block Ships Applied in Nagasaki Experimental Tank.
PB251430

Publication Date	1976
Personal Author	Tamura, K.
Page Count	16
Abstract	The model-ship correlation method applied in the Nagasaki Experimental Tank, MHI and its historical background are described. The method, which belongs to the category of theoretical methods, has been used for speed and power prediction of various kinds of ships during these twenty years. The difficulty in power prediction caused by the rapid expansion in size and block coefficient has been overcome by the introduction of a three-dimensional extrapolation method in place of the two-dimensional one, without making any serious misleading prediction. For the current high block ships, it is essential to distinguish the type of flow pattern, around the stern of the model since two kinds of flow pattern exist. The method used to distinguish the flow in model and its influence on model-ship correlation are discussed.
Keywords	Ship models Model tests Predictions Velocity Marine surface propulsion Correlation Wakes Hydrodynamics Model basins Tanker ships Marine propellers Japan High block ships
Source Agency	Mitsubishi Heavy Industries
NTIS Subject Category	47A - Marine Engineering 46B - Fluid Mechanics
Corporate Authors	Mitsubishi Heavy Industries Ltd., Tokyo (Japan).
Document Type	Technical Report
NTIS Issue Number	197612