Single-Side Thermal Shock Apparatus With Selective Insulation
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Solution Overview
Problem
Existing methods for single-side thermal shock testing of specimens are costly and complex, with limitations such as potential alteration of specimen performance due to physical contact and low heating rates, and fail to accurately mimic extreme temperature conditions experienced by devices like thruster nozzles and cryogenic tanks.
Innovation Solution
An apparatus comprising a base with an internal cavity and thermal insulation, where the specimen is supported on a recessed surface within the base, allowing only one side to be exposed to thermal shock while other surfaces are insulated, using a temperature-changing device to create a controlled thermal gradient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional apparatus such as Quartz infrared banks, laser irradiation, high speed wind tunnels, or arc jet test chambers are used for single-side thermal shock testing, then thermal shock conditions can be simulated, but the setup becomes elaborate, equipment becomes complex, and costs become extremely high
Solution Approach 1:
The patent extracts only the essential function of thermal shock simulation from complex conventional apparatus. By using a simple base with selective thermal insulation, it isolates the core requirement (one-sided thermal exposure) without needing elaborate equipment like arc jet chambers or laser systems, thereby reducing device complexity while maintaining thermal shock simulation capability
Solution Approach 2:
The patent employs inexpensive, easily replaceable components such as a simple base structure and standard thermal insulation materials instead of costly, complex equipment. This allows for cost-effective thermal shock testing without requiring expensive apparatus that would need maintenance or replacement
2Ease of manufacture
If a hot plate is used for heating the specimen, then thermal shock testing can be performed, but physical contact may alter specimen performance, heating rate is low, and temperature variations occur across the heated surface
Solution Approach 1:
The patent introduces thermal insulation as an intermediary element between the base and the specimen. This insulation layer selectively blocks heat transfer to specific areas, creating controlled thermal gradients without requiring direct contact heating that causes temperature non-uniformity. The insulation acts as a mediator to achieve precise thermal exposure patterns
Solution Approach 2:
The patent replaces the mechanical contact heating system (hot plate) with a thermal field-based approach using selective insulation. Instead of mechanically contacting the specimen with a heating element, the system uses thermal radiation and convection from the base, substituting mechanical interaction with thermal field interaction to avoid contact-related distortions
3Use of energy by stationary object
If thermal insulation covers all surfaces of the base, then heat retention is improved, but single-side thermal shock simulation is prevented
Solution Approach 1:
The patent applies thermal insulation selectively to specific areas of the base rather than uniformly across all surfaces. This local differentiation allows the insulated regions to retain heat while non-insulated regions remain thermally accessible, creating the necessary thermal gradient for single-side shock simulation. Each region has different thermal properties tailored to its functional requirement
Solution Approach 2:
The base is segmented into thermally distinct zones through selective insulation placement. The insulation divides the base into heat-retaining areas and heat-exchange areas, allowing independent thermal control of different regions. This segmentation enables simultaneous heat retention for energy efficiency and thermal gradient creation for testing
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 setup allows for cost-effective, non-invasive thermal evaluation of specimens with high heating rates and accurate simulation of single-side thermal shock conditions, reducing the risk of specimen performance alteration and providing reliable test results.
Implementation Method 1
The thermal insulation may not substantially cover the first outer surface, but may substantially cover other outer surfaces of the base
Implementation Method 2
An apparatus and/or method is needed which may solve one or more problems of one or more of the conventional apparatus and methods for single-side, thermal shock testing of a specimen
Data Source
AI summary
An apparatus for single-side, thermal shock testing of a specimen may comprise a base and thermal insulation. The base may comprise an internal cavity disposed within the base. The internal cavity may extend through a first outer surface of the base. A specimen-supporting surface may be recessed within the first outer surface for supporting a specimen within the base to substantially close the internal cavity. The thermal insulation may not substantially cover the first outer surface, but may substantially cover other outer surfaces of the base.