Air Bubble Generator for Rudder Resistance Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for reducing rudder resistance in boats are ineffective in significantly lowering the resistance experienced by the rudder during propeller rotation, leading to high fuel gas consumption.
Innovation Solution
An air bubble generator is installed in front of the rudder, utilizing Bernoulli's principle to generate air bubbles that isolate the high-speed water flow from the rudder, reducing friction contact and thereby decreasing rudder resistance, with a gas guide device using engine waste gas or low-pressure gas to power the bubble generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional streamline design modification or surface treatment is applied to the rudder, then the rudder resistance is reduced slightly, but the effect is not significant and fuel consumption remains high
Solution Approach 1:
The patent introduces air bubbles as an intermediary substance between the water flow and the rudder surface. These air bubbles form an air-water two-phase flow layer that mediates the interaction between the high-speed water flow and the rudder, reducing direct friction contact. The air bubble generator serves as the device that creates this intermediary layer, allowing the rudder to operate with reduced resistance while maintaining steering function.
Solution Approach 2:
The patent applies pneumatic principles by introducing gas (air) into the water flow environment around the rudder. The air bubble generator creates pneumatic disturbances that generate air bubbles in the water, forming an air-water two-phase flow system. This pneumatic-hydraulic interaction reduces the effective friction between water and rudder surface, thereby reducing resistance and energy consumption.
2Strength
If the rudder is designed with modified streamline or surface treatment, then structural strength is maintained, but rudder resistance reduction is insufficient
Solution Approach 1:
Instead of modifying the rudder structure itself, the patent uses air bubbles as an intermediary that acts between the water flow and the rudder surface. This approach preserves the original rudder structure and its strength characteristics while introducing a new phase (air) that reduces friction. The air bubble generator and gas guide device provide this intermediary function without altering the rudder's structural integrity.
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 method effectively reduces rudder resistance by using air bubbles to minimize contact between the high-speed water flow and the rudder, resulting in significant energy savings without altering the boat's original design.
Implementation Method 1
employing Bernoulli's principle to produce a negative pressure in said gas release outlets for sucking in outside air for generating air bubbles
Implementation Method 2
utilizing the air bubbles thus produced to isolate a part of the high-speed flow of water and said rudder and to reduce friction contact between the high-speed flow of water and said rudder
Data Source
AI summary
The present invention relates to a rudder resistance reducing method which utilizes a negative pressure to guide in gas for generating air bubbles, reducing the resistance of the rubber of a boat. The present invention uses an air bubble generator in front of the rudder for generating bubbles during rotation of the propeller of the boat to cause a high-speed flow of water without changing the original design of the boat, enabling the air bubbles to isolate contact between the high-speed flow of water and the rudder, thereby reducing rudder resistance and saving energy consumption.