Asymmetric Scroll Particle Separator for Compact Engine Layout
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Solution Overview
Problem
Conventional inlet particle separator systems for aircraft engines are bulky and displace other essential components due to their continuous, single-arm design, which limits space efficiency and flexibility in engine configurations.
Innovation Solution
An asymmetric inlet particle separator system featuring a bifurcated duct system and an asymmetric scroll with differently sized arms, allowing scavenge air to be turned in opposite directions and efficiently vented, while enabling more compact design options by allowing peripheral equipment placement within gaps between scroll arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous single-arm collector assembly is used, then the particle separation function is achieved, but the space occupied is large and other components are displaced
Solution Approach 1:
The continuous single-arm collector assembly is segmented into multiple discrete arms (first arm, second arm, third arm, fourth arm) that are distributed around the separator assembly. This segmentation allows the collector to maintain its particle collection function while reducing the overall space occupied and enabling better integration with other engine components.
Solution Approach 2:
The collector assembly transitions from a single continuous arm design to a multi-arm design that utilizes three-dimensional space more efficiently. The arms are positioned at different angular locations and heights, allowing the system to collect particles from multiple directions while occupying less overall volume within the engine structure.
2Reliability
If a continuous single-arm collector assembly is used, then particle collection is effective, but flexibility in engine configuration is limited
Solution Approach 1:
The collector assembly is divided into multiple independent arms that can be selectively positioned and configured. This segmentation provides flexibility in adapting the particle separator system to different engine layouts and configurations, as the arms can be arranged to accommodate various component placements while maintaining effective particle collection.
Solution Approach 2:
The multi-arm collector design serves multiple functions: it collects particles from different locations, accommodates various engine configurations, and allows for flexible integration with other engine components. This universal design approach enables the same basic structure to be adapted to different engine types and layouts.
3Volume of stationary object
If a compact asymmetric scroll design is used, then space utilization is improved, but the complexity of the duct system increases
Solution Approach 1:
The duct system is bifurcated into multiple channels (core air channel, scavenge air channel, and multiple arm channels) that are clearly segmented and organized. This segmentation, while increasing the number of components, provides clear functional separation that simplifies the design and maintenance of each individual channel while achieving compact overall dimensions.
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 asymmetric design reduces the cross-sectional area of the scroll, facilitates better space utilization, and allows for flexible placement of engine peripherals, enhancing space savings and operational efficiency by separating inlet air into cleaner core air and scavenge air effectively.
Implementation Method 1
The scavenge air channel includes a first plurality of turning vanes configured to turn the scavenge air in a first direction within the scavenge air channel, and a second plurality of turning vanes configured to turn the scavenge air in a second direction within the scavenge air channel
Implementation Method 2
The asymmetric scroll includes a first arm having a first arm length and configured to receive the scavenge air from the first plurality of turning vanes, and a second arm having a second arm length that is different than the first arm length and configured to receive the scavenge air from the second plurality of turning vanes
Data Source
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AI summary
An asymmetric inlet particle separator system (AIPS) includes a bifurcated duct system that defines an inlet for receiving inlet air. The bifurcated duct system includes a core air channel and a scavenge air channel and is configured to separate the inlet air into core air and scavenge air. The scavenge air channel includes a first plurality of turning vanes configured to turn the scavenge air in a first direction and a second plurality of turning vanes configured to turn the scavenge air in a second direction. The AIPS also includes an asymmetric scroll coupled to the scavenge air channel. The asymmetric scroll includes a first arm having a first arm length and a second arm having a second arm length that is different than the first arm length.