Parabolic Blowing Nozzle with Concentric Outlets for Gas Amplification
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Solution Overview
Problem
Existing blowing nozzles for pressurized gases face challenges in reducing gas consumption while maintaining sufficient force, as they often require high energy for compressing gases, leading to increased operating costs and lower force output.
Innovation Solution
A blowing nozzle design with a parabolic blowing end that efficiently entrains ambient gases using the Coanda effect, featuring a central outlet and multiple concentric outlets with varying diameters and angles, along with fins to enhance laminar flow and reduce turbulence, thereby increasing force output with reduced compressed gas consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If compressed gas pressure is increased to increase force output, then force is improved, but gas consumption and energy use increase
Solution Approach 1:
The nozzle employs nested concentric outlets where smaller outlets are positioned within larger ones, creating multiple flow paths that work together. The central outlet is surrounded by first outlets, which are in turn surrounded by second outlets, forming a nested structure that efficiently combines flows to amplify force output without requiring proportional increases in compressed gas consumption
Solution Approach 2:
The invention transitions from single-point or simple linear outlet arrangements to a three-dimensional concentric configuration with outlets at different radial distances from the blowing axis. This spatial dimensionality allows multiple gas streams to converge and interact in a controlled manner, creating amplified flow patterns that increase force while managing gas consumption
2Force
If more compressed gas is consumed to maintain force output, then force is maintained, but energy consumption and operating costs increase
Solution Approach 1:
The nozzle design allows the gas flow itself to perform the work of amplification through the Coanda effect, where the compressed gas from the outlets automatically draws in and mixes with ambient air without requiring additional energy input. The system uses the properties of the gas flow and ambient environment to achieve force amplification, making the energy-efficient amplification process self-sustaining
3Loss of substance
If ambient gases are entrained into the flow to reduce compressed gas consumption, then gas consumption is reduced, but force output may decrease
Solution Approach 1:
The invention utilizes pneumatic principles through the Coanda effect, where the compressed gas streams from the concentric outlets attach to and follow the curved nozzle surface, creating low-pressure zones that actively draw in ambient air. This pneumatic mechanism ensures that entrained ambient gases are systematically incorporated into the core flow in a controlled manner that maintains or enhances force output while reducing compressed gas consumption
4Ease of manufacture
If nozzle design is simplified to reduce complexity, then manufacturing is easier, but gas amplification efficiency may be reduced
Solution Approach 1:
The nozzle is segmented into distinct functional zones with outlets arranged in concentric rings at different radial positions. This segmentation allows each outlet group to perform a specific function in the gas amplification process, making the complex flow patterns achievable through modular design elements that can be manufactured using standard techniques while maintaining high gas amplification efficiency
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 nozzle achieves a significant amplification of the airflow, potentially up to 25-fold, while maintaining or increasing force output with lower energy consumption, by effectively entraining ambient gases and minimizing turbulence, thus reducing operating costs.
Implementation Method 1
Air amplifying nozzles address gas consumption by entraining ambient air into the flow generated by the nozzle using the Coanda effect
Implementation Method 2
The slight inward angling of the holes encourages a more laminar flow pattern at the first and central outlets, which in turn prevents turbulence that otherwise reduces the force applied by the nozzle
Data Source
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AI summary
A blowing nozzle having a substantially parabolic blowing end is provided which entrains ambient gasses into the output flow. A plurality of outlets are arranged so as reduce turbulence within the flow. The substantially parabolic blowing end converges at an apex coaxial with a blowing axis. A central outlet is provided at the apex to generate a core stream of gas. First outlets surround the central outlet. Second outlets surround the first outlets and are angled inward toward the blowing axis. Fins and/or additional outlets may be provided.