Benchtop Ice Accretion Apparatus for Coating Testing
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Solution Overview
Problem
Current methods for testing ice-phobic coatings are inadequate, as bench-top ice adhesion tests do not accurately represent real-world conditions, leading to unnecessary and costly further testing in icing wind tunnels, which are time-consuming and expensive.
Innovation Solution
An ice accretion apparatus with a bench-top ice testing device that includes a column with a droplet discharge device, chamber cooling means, and a target, allowing for the simulation of atmospheric icing conditions, enabling the creation of ice representative of real-world scenarios in a smaller, more cost-effective, and time-efficient manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bench-top ice adhesion test methods are used to test coating performance, then testing can be performed quickly and conveniently, but the ice created is not representative of real-world atmospheric ice, leading to inaccurate results
Solution Approach 1:
The patent applies parameter changes by controlling temperature, humidity, and droplet characteristics in the chamber to simulate atmospheric icing conditions. The chamber cooling means maintains temperatures below freezing, and the droplet discharge device creates super-cooled water droplets that freeze on contact with the target, replicating real-world ice formation parameters
Solution Approach 2:
The patent creates a simplified copy of atmospheric icing conditions within the chamber. By using a droplet discharge device to generate super-cooled water droplets that freeze on the target surface, the apparatus reproduces the essential characteristics of atmospheric ice accretion on a small scale, providing accurate testing without requiring full-scale wind tunnel facilities
2Measurement precision
If icing wind tunnel testing is used to achieve representative atmospheric ice conditions, then measurement accuracy is improved, but the process becomes time-consuming and expensive
Solution Approach 1:
The patent extracts the essential elements of atmospheric icing (super-cooled water droplets, freezing temperatures, droplet impingement) from the complex wind tunnel environment and concentrates them in a simplified chamber setup. This allows accurate ice formation testing to be performed in a compact,快速 device without requiring full wind tunnel facilities
Solution Approach 2:
The patent uses a disposable or easily replaceable target holder that can be quickly exchanged between tests. The simple chamber design allows for rapid setup and teardown, enabling multiple coating samples to be tested sequentially without the time-consuming preparation and cleanup required in wind tunnel facilities
3Measurement precision
If icing wind tunnel testing is used to achieve representative atmospheric ice conditions, then measurement accuracy is improved, but testing cost increases significantly
Solution Approach 1:
The patent employs inexpensive, easily replaceable components such as the target holder and droplet discharge device. These components can be manufactured at low cost and replaced between tests, eliminating the need for expensive wind tunnel facilities while maintaining accurate ice formation testing capabilities
Solution Approach 2:
The patent creates an affordable simplified copy of atmospheric icing conditions using basic components (chamber, cooling means, droplet discharge device) rather than requiring expensive wind tunnel infrastructure. This copied system reproduces the essential physics of ice accretion at a fraction of the cost
4Measurement precision
If larger samples are used in icing wind tunnel testing, then representative ice formation is achieved, but device complexity and space requirements increase
Solution Approach 1:
The patent concentrates the ice formation process in a localized chamber environment where all necessary conditions (temperature, humidity, droplet supply) are controlled in a compact space. The target surface is positioned within this controlled local environment, allowing accurate ice accretion measurement without requiring large apparatus
Solution Approach 2:
The patent nests the target holder and droplet discharge device within the chamber, creating a compact hierarchical structure. The chamber itself can be positioned on a standard laboratory bench, with all components nested within each other to minimize overall footprint while maintaining accurate testing capabilities
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 apparatus allows for the accurate simulation of ice formation and adhesion, reducing the need for larger, more expensive icing wind tunnel tests by replicating atmospheric icing conditions, thereby improving the efficiency and effectiveness of ice-phobic coating testing.
Implementation Method 1
chamber cooling means configured to cool the chamber during a test and thereby to cool the water droplets, whereby, in use during the test, a layer of accreted ice is built up on the target
Implementation Method 2
The chamber cooling means for cooling the chamber during a test may be configured to cool or super-cool the water droplets as they travel down the chamber from the droplet discharge device to the target
Data Source
AI summary
An ice accretion apparatus comprises a column having a longitudinal axis, a side wall, and a central chamber having top and bottom ends. It also comprises a top unit which closes the top end of the chamber and includes a droplet discharge device for producing water droplets, a bottom unit which closes the bottom end of the chamber and includes a target, and chamber cooling means configured to cool the chamber during a test and thereby to cool the water droplets, whereby, in use during the test, a layer of accreted ice is built up on the target.