Bubble Generator Slit and Column Geometry for Microbubble Efficiency
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Solution Overview
Problem
Existing bubble generators face inefficiencies in generating microbubbles in water flows, particularly in creating sufficient vacuum areas for effective microbubble production.
Innovation Solution
A bubble generator design featuring a tubular main body with radially extending slits and protruding columns, where the columns' protrusion gradually reduces towards the upstream side and include recesses on their downstream surfaces, creating multiple vacuum areas for enhanced microbubble generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If columns with uniform protrusion are used to create vacuum areas, then microbubble generation is achieved, but the flow velocity increase and vacuum area creation are insufficient for high efficiency
Solution Approach 1:
The columns are designed with asymmetric protrusion lengths, where the protrusion amount gradually decreases from the periphery toward the upstream side. This asymmetric configuration creates varying flow resistance across different radial positions, generating stronger velocity differences and more effective vacuum areas compared to uniform protrusion designs.
Solution Approach 2:
The column protrusions are designed to create dynamic flow conditions where water velocity changes progressively as it moves through the bubble generating part. The varying protrusion heights create a dynamic velocity profile that enhances cavitation effects and microbubble generation efficiency.
2Productivity
If multiple vacuum areas are created to increase microbubble production, then bubble generating efficiency improves, but the structural complexity of the bubble generating part increases
Solution Approach 1:
Multiple functional elements (columns with varying protrusions and recesses) are merged into a single integrally-molded bubble generating part. This unified structure creates multiple vacuum areas simultaneously while maintaining manufacturing simplicity through integral formation, avoiding the need for separate components.
Solution Approach 2:
Different regions of the bubble generating part have locally optimized features: columns with specific protrusion patterns in certain areas create stronger vacuum effects, while recesses are strategically positioned to enhance velocity at critical locations. This local optimization achieves high efficiency without requiring complex overall restructuring.
3Productivity
If columns protrude significantly to create vacuum areas, then microbubble generation is enhanced, but the flow resistance increases and may reduce overall flow rate
Solution Approach 1:
Instead of using full-length columns throughout, the design employs partial protrusions that gradually decrease toward the upstream side. This partial action approach creates sufficient vacuum areas for effective microbubble generation while minimizing excessive flow resistance that would occur with uniform full-length columns.
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
This design significantly increases the flow velocity of water, leading to the creation of numerous vacuum areas and thus a substantial increase in microbubble production, even without the use of pumps, making it efficient and cost-effective for various water flow applications.
Implementation Method 1
a vacuum area is created downstream from the restrictor according to Bernoulli's principle, and gases dissolved in the water are released due to a cavitation effect
Implementation Method 2
gases dissolved in the water are released due to a cavitation effect (effect of reduced pressure) so that microbubbles are generated
Data Source
AI summary
The purpose of the present disclosure is, in a bubble generating device provided with a bubble generating unit for generating minute bubbles in water flowing through the inside of the cylindrical main body unit, to improve the bubble generating efficiency of the bubble generating unit. Provided is a bubble generating device provided with a cylindrical main body unit and a bubble generating unit disposed within the main body, wherein: the bubble generating unit is provided with slits extending radially centered on one point within the main body unit in a cross-sectional plane of the main body unit, and a column part protruding from the inner peripheral surface of main body unit and formed on the peripheral edge of the slits; and the amount of protrusion of the column part is gradually reduced toward the upstream side from the peripheral edges of the slits, and the column part has a recessed part formed on the downstream surface.