Coanda Flow Booster With Segmented Gas Feed for Stable Low-Speed Conveying
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Solution Overview
Problem
Existing Coanda effect flow amplifiers are inefficient at low conveying speeds, causing damage to fragile materials like pollen due to turbulence and non-uniform gas flow, and are poorly optimized in terms of mass and size, making them difficult to integrate into aeraulic systems.
Innovation Solution
A Coanda effect flow amplifier with multiple feed orifices and a distribution duct configuration that ensures a uniform and stable flow of compressed driving gas, reducing turbulence and improving amplification efficiency by at least 25% through the use of a convex amplification profile and adjustable flow cross sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a Coanda effect flow amplifier operates at low conveying speeds, then it can handle fragile materials like pollen, but the gas flow becomes non-uniform and turbulent causing damage to the materials
Solution Approach 1:
The distribution duct is divided into multiple separate feed orifices instead of a single opening. Each orifice is equipped with individual flow control means, allowing independent adjustment of gas flow through each orifice. This segmentation enables uniform distribution of driving gas across the amplification profile even at low conveying speeds, preventing turbulence while maintaining the ability to handle fragile materials like pollen
Solution Approach 2:
Each feed orifice is equipped with local flow control means (adjustable valves or variable section mechanisms) that allow independent adjustment of gas flow characteristics. This local control ensures that each region of the distribution duct delivers uniformly controlled gas flow, maintaining flow stability and preventing turbulence at low conveying speeds throughout the entire system
2Weight of moving object
If the amplifier structure is simplified for easier integration, then mass and size are reduced, but flow distribution uniformity and stability deteriorate
Solution Approach 1:
The invention uses pneumatic control mechanisms (valves, adjustable orifices) integrated into the distribution duct system to control gas flow. These pneumatic components allow precise flow distribution control without adding significant mechanical complexity or weight, maintaining flow stability while keeping the amplifier structure compact and suitable for integration into aeraulic systems
3Stability of the object's composition
If multiple feed orifices are added to improve flow uniformity, then flow distribution improves, but device complexity increases
Solution Approach 1:
The flow control means integrated into each feed orifice serve multiple functions: they regulate gas flow rate, adjust flow distribution patterns, and maintain pressure balance across the distribution duct. This multi-functionality reduces the need for separate control systems for each orifice, thereby limiting the increase in device complexity while achieving uniform flow distribution across all feed points
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 provides a significantly improved air flow rate and stability at low conveying speeds, effectively protecting fragile materials and optimizing the amplifier's mass and size for easier integration into aeraulic systems.
Implementation Method 1
a convex surface configured to bring about a Coanda effect in a flow of compressed driving gas injected through said at least one injection orifice
Data Source
AI summary
The invention relates to a Coanda effect flow booster (10) for inducing a boosted flow of gas, comprising: —a main air circulation pipeline (14), —at least one injection opening that opens into the main pipeline (14), —a plurality of openings for supplying compressed motive gas, each opening configured to be connected to a source of compressed motive gas in order to supply the at least one injection opening with compressed motive gas, —at least one distribution pipeline connecting the plurality of supply openings to the at least one injection opening, —a booster profile (48) at least partially defining the at least one injection opening and forming a convex surface configured to create a Coanda effect in a flow of compressed motive gas injected through the at least one injection opening.