Collapsible Railcar Deflector for Container Drag Reduction
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Solution Overview
Problem
Intermodal shipping containers experience significant aerodynamic drag when transported by train, leading to increased fuel consumption, transport costs, and pollution, and existing solutions to reduce drag either compromise the container's stacking ability, capacity, or require costly redesigns.
Innovation Solution
A collapsible deflector designed as a triangular prism that can be attached to railcars and containers, featuring a base, sidewall, and top wall connected to form an internal volume, which can be bisected by dividers, and includes a bonding complex for secure attachment, allowing it to deflect air while maintaining the container's stacking capability and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a device is installed to reduce aerodynamic drag, then fuel consumption decreases, but the container's stacking ability or capacity may be compromised
Solution Approach 1:
The deflector is designed to be collapsible rather than fixed, allowing it to be compressed to a small size for stacking during transport, then expanded when needed for drag reduction. This dynamic transformation resolves the contradiction by making the drag-reducing structure adaptable to both operational and storage conditions.
Solution Approach 2:
The collapsible deflector can be nested within or alongside containers when not in use, similar to how smaller objects are nested within larger ones. This allows the drag-reducing device to be stored without permanently occupying space that would interfere with stacking capabilities.
2Loss of energy
If the container design is modified to reduce drag, then aerodynamic efficiency improves, but capacity or stacking capability may be reduced
Solution Approach 1:
Instead of modifying the container itself, the drag-reducing function is extracted and implemented through a separate, removable deflector device. This allows aerodynamic improvement without altering the container's design, capacity, or stacking capability.
Solution Approach 2:
The deflector acts as an intermediary device positioned between the airflow and the container, providing drag reduction without requiring integration into the container structure. This mediator approach preserves the original container design while achieving aerodynamic benefits.
3Loss of energy
If a rigid deflector is used to reduce drag, then aerodynamic performance improves, but shipping and storage become cumbersome
Solution Approach 1:
The deflector transitions from a rigid, bulky form during operation to a collapsed, compact form during storage and shipping. This dynamic capability resolves the contradiction by allowing the structure to adapt its physical state based on operational requirements.
Solution Approach 2:
The deflector is designed with segmented or foldable components that can be collapsed together, reducing its overall volume for storage while maintaining its aerodynamic shape when deployed. This segmentation allows easy shipping and storage without sacrificing drag-reduction performance.
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 deflector effectively reduces aerodynamic drag on railcars and containers without altering their design or capacity, while being collapsible for easy shipping and durable enough to withstand environmental conditions.
Implementation Method 1
the rectangular shape of the container, although useful for maximizing capacity and stacking capability, is not aerodynamically efficient. When transported by train, the gap in between the train cars causes much of this aerodynamic resistance.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A deflector for use with railcars and containers. The deflector may be used to retrofit railcars and other container to reduce aerodynamic drag. The deflector may be collapsible for use with stacked containers.