Particle Separator Scupper Design for Low Pressure Loss
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Solution Overview
Problem
Current particle separators in aircraft experience high pressure losses due to high air velocities in inlet ducts, which hinder effective collection of liquid water droplets and lead to moisture issues in cabins.
Innovation Solution
A particle separator design featuring a tangentially ducted inlet air to an outer cylindrical collector with a scupper arrangement that utilizes centrifugal force for water separation and energy recovery from swirling air, minimizing pressure losses without the need for swirl vanes, thus preventing re-entrainment of water droplets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high air velocities are used in inlet ducts of swirlers, then water droplets are effectively separated due to centrifugal force, but pressure losses increase significantly
Solution Approach 1:
The patent applies dynamics by allowing the airflow to naturally generate swirl motion as it enters the separator along curved streamlines, eliminating the need for mechanical swirl vanes. The tangential inlet configuration converts the high velocity air flow into rotational motion dynamically, achieving water droplet separation through centrifugal force without additional energy-consuming components.
Solution Approach 2:
The patent extracts and removes the swirl vanes from the system entirely. Instead of using mechanical swirl vanes to generate rotation, the design relies on the tangential inlet geometry to naturally induce swirl motion in the airflow, thereby eliminating the need for separate swirl-generating components and reducing pressure losses associated with them.
2Reliability
If swirl vanes are used to generate centrifugal force for water separation, then separation efficiency improves, but device volume and complexity increase
Solution Approach 1:
The patent extracts and removes the swirl vanes from the system entirely. Instead of using mechanical swirl vanes to generate rotation, the design relies on the tangential inlet geometry to naturally induce swirl motion in the airflow, thereby eliminating the need for separate swirl-generating components and reducing pressure losses associated with them.
Solution Approach 2:
The tangential inlet configuration serves multiple functions simultaneously: it directs airflow into the separator, generates swirl motion through its angled entry, and creates the centrifugal force necessary for water droplet separation. This multi-functional design eliminates the need for separate swirl vanes, reducing device complexity while maintaining separation efficiency.
3Reliability
If traditional particle separators are used, then water collection is achieved, but device volume is larger due to required swirl vanes
Solution Approach 1:
The patent extracts and removes the swirl vanes from the system entirely. Instead of using mechanical swirl vanes to generate rotation, the design relies on the tangential inlet geometry to naturally induce swirl motion in the airflow, thereby eliminating the need for separate swirl-generating components and reducing pressure losses associated with them.
Solution Approach 2:
The patent merges the inlet duct configuration with the swirl-generating function. The tangential inlet is designed to directly produce rotational airflow without requiring separate swirl vanes, combining what would traditionally be separate components into a unified, more compact structure that reduces overall device volume.
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 design achieves low pressure losses and efficient water collection, minimizing moisture issues in aircraft cabins while optimizing device volume.
Implementation Method 1
A scupper arrangement provides for the separation of the water from the inlet air and provides for the collection of the water along the outer wall due to centrifugal force
Implementation Method 2
the outlet is arranged to recover the energy from the swirling air without allowing re-entrainment of the water droplets. This recovery results in low pressure losses
Data Source
Figure 1~2
Figure 3~4
AI summary
A particle separator (10) is provided and includes a vessel (20) and a scupper (30). The vessel (20) is receptive of a fluid flow and configured to output the fluid flow at first and second outlets (24,25). The vessel (20) includes a curved, inwardly facing surface (22). The scupper (30) is disposed within the vessel (20) to define a first flowpath (40) along which the received fluid flow is directed to flow toward the first outlet (25) between the curved, inwardly facing surface (22) and a first side (31) of the scupper (30), and a second flowpath (50) along which the received fluid flow is directed to flow toward the second outlet along a second side (32) of the scupper (30), which is opposite the first side (31).