Aircraft Bleed-Off Intake Device with Airfoil Particle Separation
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Solution Overview
Problem
Aircraft propulsion systems face challenges in managing contaminants such as particulate matter in compressed air, which can affect the operation of sensitive components like bleed-off valves and pneumatic actuators.
Innovation Solution
The introduction of a particle separator body with an airfoil configuration and an air conduit within the intake device, which separates and directs particulate matter away from sensitive components, reducing exposure and enhancing the functionality of bleed-off valves and pneumatic actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compressed air is used for operation of aircraft propulsion systems, then the systems can function properly, but particulate matter contaminants are entrained with the compressed air and affect sensitive components
Solution Approach 1:
The intake device is segmented into distinct functional zones: an inlet cavity for receiving compressed air, a particle separator body with airfoil configuration for separating particulate matter, and an air conduit for directing cleaned air to the pneumatic actuator. This segmentation allows each component to perform its specific function effectively, separating the contamination removal function from the air delivery function.
Solution Approach 2:
The particle separator body extracts and removes particulate matter from the compressed air stream. The airfoil configuration specifically targets and separates contaminants from the breathable air, taking out the harmful elements before the air reaches the sensitive pneumatic actuator and bleed-off valve.
2Object-affected harmful factors
If a particle separator body with airfoil configuration is introduced, then particulate matter is separated and directed away from sensitive components, but the device complexity increases
Solution Approach 1:
The particle separator body merges multiple functions into a single component: it serves as both a structural element of the intake device and a particle separation mechanism. The airfoil configuration combines aerodynamic principles with particle separation, eliminating the need for separate filtration components and reducing overall device complexity despite the added functionality.
Solution Approach 2:
The airfoil-configured particle separator body performs multiple functions: it directs airflow, separates particulate matter, and protects downstream components. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while achieving comprehensive particle separation and component protection.
3Object-affected harmful factors
If the particle separator body extends from upstream end to downstream end, then particulate matter separation is effective, but the length of the intake device increases
Solution Approach 1:
The particle separator body employs an airfoil configuration with curved surfaces instead of straight linear extensions. This curvature allows the device to achieve effective particle separation through aerodynamic flow patterns while minimizing the linear length required. The streamlined shape reduces the upstream-to-downstream extension compared to a linear design.
Solution Approach 2:
Instead of extending the particle separator body primarily in the upstream-to-downstream direction (one dimension), the airfoil configuration utilizes lateral and radial dimensions to achieve particle separation. This dimensional transformation allows effective separation without proportionally increasing the length along the airflow direction.
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 solution effectively reduces the quantity of particulate matter reaching downstream components, improving the reliability and performance of bleed-off valves and pneumatic actuators by minimizing exposure to contaminants.
Implementation Method 1
The airfoil has a leading edge at the upstream end. The exterior surface forms an airfoil of the particle separator body... The air conduit includes a conduit inlet within the particle separator body... separates and directs particulate matter away from sensitive components
Data Source
AI summary
An aircraft propulsion system includes a casing, a compressor, and an assembly. The casing forms an annular cavity. The compressor is configured to direct a compressed air flow into and through the annular cavity in an air flow direction. The assembly includes an intake device disposed on the casing. The intake device includes a particle separator body and an air conduit. The particle separator body extends from an upstream end to a downstream end in the air flow direction. The particle separator body forms an interior surface and an exterior surface. The interior surface forms an inlet cavity of the intake device. The inlet cavity has an inlet opening at the downstream end. The exterior surface forms an airfoil of the particle separator body. The air conduit extends through the casing. The air conduit includes a conduit inlet within the particle separator body. The conduit inlet is disposed at the inlet cavity.