Surface Propeller Boat Hull with Venturi Air Intake
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Solution Overview
Problem
Current boat propulsion systems face issues such as high resistance, vibration, friction losses, and cavitation due to traditional submerged shafts and propulsion systems, which reduce efficiency and increase corrosion and wear, especially at high speeds and in shallow waters.
Innovation Solution
A boat design featuring a hull with a hollow compartment that exploits the Venturi effect for maintaining a constant air pressure around the propulsion means, reducing friction and cavitation by using an atmospheric-pressure air intake and pressurized gas from the engine exhaust to keep the propulsion area free of water, and incorporating a surface propeller with inclined blades for optimal thrust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional submerged shafts and propulsion systems are used, then propulsion function is achieved, but resistance to advancement increases and efficiency decreases
Solution Approach 1:
The invention extracts the propulsion means from the traditional submerged position and relocates them to operate on the water surface, eliminating the energy losses associated with submerged appendages and their interaction with turbulent water flow
Solution Approach 2:
The propulsion system transitions from operating in the submerged three-dimensional water environment to operating on the two-dimensional water surface, fundamentally changing the operational dimension to reduce resistance and improve efficiency
2Power
If traditional submerged propulsion systems are used, then thrust is generated, but vibration and cavitation occur at high speeds
Solution Approach 1:
The invention removes the propulsion means from the submerged environment where cavitation and vibration occur, placing them in the air above the water surface where these harmful phenomena are eliminated while maintaining thrust generation capability
Solution Approach 2:
The invention introduces an air cushion as an intermediary medium between the propulsion means and water, allowing thrust to be generated without direct contact between the propulsion elements and water, thereby eliminating cavitation and vibration
3Stability of the object's composition
If submerged appendages are used for support, then structural stability is achieved, but friction increases with the square of speed
Solution Approach 1:
The invention extracts the support appendages from the submerged position and replaces them with a planing hull configuration that operates on the water surface, eliminating the speed-squared friction losses associated with submerged support structures
Solution Approach 2:
The invention replaces the mechanical submerged support system with a hydrodynamic planing surface system, where the hull itself provides support through hydrodynamic lift rather than mechanical appendages, dramatically reducing friction losses
4Ease of operation
If traditional inboard/outboard assemblies with conical gears are used, then propulsion direction control is achieved, but friction of appendices and exposure to salt contamination increase corrosion and wear
Solution Approach 1:
The invention extracts the propulsion means from the traditional inboard/outboard assembly position and relocates them to operate on the water surface, removing them from the corrosive saltwater environment and eliminating exposure to salt-containing contamination
Solution Approach 2:
The invention introduces air as an intermediary protective layer between the propulsion means and the corrosive saltwater environment, preventing direct contact and thereby eliminating corrosion and wear from salt contamination
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 solution significantly reduces resistance, vibration, and friction losses, enhances steering ability, and minimizes corrosion and wear, making the boat more efficient and suitable for various water conditions, including high speeds and shallow waters.
Implementation Method 1
A boat design featuring a hull with a hollow compartment that exploits the Venturi effect for maintaining a constant air pressure around the propulsion means
Implementation Method 2
propulsion propellers, impellers or paddle wheels, intended to exploit the thrust provided by the acceleration of a fluid, in this case water
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A boat comprising a hull (10) and a propulsion means (3) suitably coupled to an inboard drive means (8), characterized in that said hull (10) is provided with at least one hollow (2) suitably shaped to at least partially accommodate said propulsion means (3), said hollow (2) being provided with at least one tube (21) and at least one atmospheric-pressure air intake (220) in such a way that the propulsion means, that is a surface propeller (3), can continuously operate under optimal conditions with respect to the thus-generated artificial water surface.