Self-Aligning Water Turbine Rotor for Boat Flow Mismatch
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Solution Overview
Problem
Existing water turbine systems on water vehicles are inefficient when the boat's heading is different from the water flow direction, leading to reduced energy production due to the rotor being misaligned with the flow vector, especially during tacking or anchoring.
Innovation Solution
A turbine system that automatically adjusts to the combined flow vector of the water vehicle's land velocity and water flow velocity, ensuring the rotor is aligned for maximum efficiency by turning 360° to face the flow vector, regardless of the boat's direction or anchoring position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the rotor axis is fixed in a certain direction relative to the boat, then the structure is simple and easy to manufacture, but the energy production efficiency decreases when the boat's heading differs from the water flow direction
Solution Approach 1:
The rotor assembly is made dynamically adjustable through a pivot mechanism that allows the rotor axis to rotate and align with the combined flow vector. The entire turbine assembly can pivot around a vertical axis, transforming from a fixed static structure to a dynamic one that automatically adjusts its orientation based on flow conditions, thereby resolving the contradiction between structural simplicity and energy production efficiency.
Solution Approach 2:
The system employs passive alignment where the rotor assembly automatically orients itself along the combined flow vector through hydrodynamic forces and gravitational effects on the pivot mechanism. No active control systems, sensors, or power consumption are required - the structure self-adjusts based on physical principles, maintaining simplicity while maximizing energy capture efficiency.
2Ease of operation
If the rotor is aligned with the boat's bows line, then the alignment is simple to maintain, but the energy capture efficiency decreases when the boat moves in directions different from the water flow
Solution Approach 1:
The rotor assembly incorporates a pivot mechanism that enables dynamic reorientation of the rotor axis. The assembly can rotate horizontally to align with the combined flow vector, which changes as the boat changes heading or drifts in current. This dynamic adjustment eliminates energy loss from misalignment while requiring minimal operational intervention.
Solution Approach 2:
The alignment system operates passively using hydrodynamic forces and gravity to automatically position the rotor assembly along the optimal flow direction. The pivot mechanism naturally seeks the position where the rotor faces the combined flow vector, eliminating the need for manual alignment or active control systems, thus maintaining ease of operation while maximizing energy capture.
3Device complexity
If the rotor axis is fixed perpendicular to the bows line, then the mechanical structure is simplified, but the effective flow velocity component acting on the rotor decreases when the boat heading differs from flow direction
Solution Approach 1:
The rotor assembly is mounted on a pivot mechanism that allows it to rotate and align with the combined flow vector. This dynamic adjustment ensures that the rotor always presents its maximum surface area perpendicular to the effective flow, maximizing the velocity component acting on the blades regardless of the boat's heading relative to the current direction.
Solution Approach 2:
The system uses passive hydrodynamic alignment where water pressure and gravitational forces automatically position the rotor assembly to face the combined flow vector. This self-aligning mechanism maintains optimal effective flow velocity without requiring complex active control systems, sensors, or additional mechanical complexity.
4Adaptability or versatility
If manual regulation of the rotor position is used, then the structure can adapt to different flow conditions, but the operational complexity and time required for adjustment increases
Solution Approach 1:
The rotor assembly automatically adjusts its position using passive hydrodynamic forces and gravity. When flow conditions change or the boat changes heading, the pivot mechanism naturally reorients the rotor to face the new combined flow vector without requiring manual intervention. This eliminates adjustment time and operational complexity while maintaining full adaptability to varying flow conditions.
Solution Approach 2:
The system incorporates implicit feedback through hydrodynamic forces that continuously act on the pivot mechanism. The water pressure distribution on the rotor assembly and supporting structure provides real-time feedback about flow direction, automatically driving the system to the optimal alignment position without sensors or active control, thus achieving adaptability without time loss.
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 system maximizes energy capture by aligning the rotor with the combined flow vector, enhancing efficiency in all driving and anchoring scenarios, including tacking and side winds.
Implementation Method 1
A turbine system that automatically adjusts to the combined flow vector of the water vehicle's land velocity and water flow velocity
Implementation Method 2
convert it into electric energy
Data Source
AI summary
An apparatus fixed to a water vehicle to produce electric energy has a turbine rotor supported under the water surface in a horizontal operation position and to it fixed first axis to transfer the rotation motion from the rotor and in which apparatus the rotor has been supported and adapted into with it same centered cylinder that has been fixed to the frame with vertically to it fixed joint that is situated a vertical distance (a) from the rotor and adapted to turn in relation to the frame that has been fixed to the water vehicle round the joint axis and to settle into the direction of the water flow by its power and where the first part of the second axis has been adapted same centered with the joint axis and the first and the second axis have been connected to each other with a rotation movement direction changer when the horizontal rotation of the first axis has been adapted to change into a vertical rotation movement in the first part and the second axis has been connected to a generator to transfer the rotation movement into it and the generator has been connected to a battery to store the generated electric energy to it.