Vessel Bottom Groove Structure for Reduced Propeller Thrust Loss
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Solution Overview
Problem
Turbulence of water flow around the propeller shaft in existing vessels leads to potential loss of thrust.
Innovation Solution
A vessel design with a hull featuring a groove section around the propeller in the vessel bottom, where the propeller shaft penetrates a shaft hole within this groove, reducing turbulence and maintaining efficient thrust generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the propeller is arranged at the vessel bottom, then the propulsion device can be compactly integrated, but turbulence of water flow occurs around the propeller shaft causing thrust loss
Solution Approach 1:
The groove section acts as an intermediary structure between the propeller shaft and the surrounding water flow. It mediates the interaction by providing a dedicated flow path that guides water away from the propeller shaft, preventing direct turbulence generation while maintaining compact integration.
Solution Approach 2:
The vessel bottom is segmented into distinct functional zones: the groove section that channels water flow, the shaft hole that accommodates the propeller shaft, and the propeller installation area. This segmentation allows each component to perform its function optimally while minimizing harmful interactions.
2Device complexity
If the propeller shaft penetrates the vessel bottom directly, then the structure is simple, but water flow turbulence increases causing thrust loss
Solution Approach 1:
The groove section provides localized modification of the vessel bottom geometry specifically at the propeller shaft location. This local quality change creates a flow-guiding structure that reduces turbulence without requiring complex modifications to the entire hull structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design minimizes thrust loss by suppressing water flow turbulence, allowing for more efficient thrust generation and stable sailing.
Implementation Method 1
a propeller that can rotate about a propeller shaft penetrating a shaft hole in the vessel bottom, and generates thrust for sailing the hull by rotation of the propeller
Implementation Method 2
turbulence of the water flow possibly occurs around the propeller shaft during a sail of the hull, and the thrust is possibly lost by the turbulence of the water flow
Data Source
AI summary
The present disclosure provides a vessel, thrust of which is less likely to be lost. A vessel includes a hull having a vessel bottom, and a propulsion device. The propulsion device has a propeller that can rotate about a propeller shaft penetrating a shaft hole in the vessel bottom, and generates thrust for sailing the hull by rotation of the propeller. The hull has the groove section, which is long in the front-rear direction, around the propeller in the vessel bottom. The shaft hole is arranged in the groove section.