Aircraft Bleed Air Switching for Lower Fuel and Energy Loss
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Solution Overview
Problem
Conventional air management systems in gas turbine engines suffer from energy loss and oversizing due to continuous bleeding from both high-pressure and low-pressure ports, which is inefficient and increases fuel consumption, especially in varying flight conditions.
Innovation Solution
An air management system that selectively uses either high-pressure or low-pressure air sources based on flight conditions, utilizing a mixing chamber with variable or fixed nozzles to optimize air delivery to air consumers, reducing the need for redundant ducting and valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If air is continuously bled from both high-pressure and low-pressure ports, then air consumers can be supplied under various flight conditions, but energy loss increases and fuel consumption increases
Solution Approach 1:
The patent implements dynamic selection between high-pressure and low-pressure air sources based on flight conditions. A control system monitors parameters such as flight altitude, engine thrust, and air consumer demands to dynamically switch between bleed ports, optimizing energy efficiency while maintaining adaptability across different operational phases.
Solution Approach 2:
The system changes operational parameters by selecting different bleed air sources (high-pressure or low-pressure) according to flight conditions. This parameter switching allows the air management system to adapt to varying altitude, thrust, and temperature requirements without continuous operation of all components, thereby reducing energy loss.
2Adaptability or versatility
If air is continuously bled from both high-pressure and low-pressure ports, then air consumers can be supplied under various flight conditions, but fuel consumption increases
Solution Approach 1:
The control system dynamically adjusts the air management configuration based on real-time flight parameters. By actively monitoring thrust settings, altitude, and air consumer demands, the system selectively activates only the necessary bleed ports, reducing unnecessary fuel consumption while maintaining the ability to serve all air consumers across different flight phases.
Solution Approach 2:
The system implements parameter-based selection where fuel-efficient operation is achieved by changing the operational state from continuous dual-port bleeding to conditional single-port or dual-port operation based on flight parameters such as altitude, thrust level, and temperature requirements.
3Adaptability or versatility
If the air management system is sized to operate at any planned flight phase, then all flight conditions are covered, but system oversizing occurs
Solution Approach 1:
The patent divides the air management system into segmented operational modes corresponding to different flight phases (take-off, climb, cruise, descent, holding). Each mode utilizes optimized configurations of bleed ports and ducting, allowing the system to be sized appropriately for each phase rather than continuously supporting all phases at maximum capacity, thereby reducing overall system complexity.
4Adaptability or versatility
If redundant ducting and valves are included to handle both high-pressure and low-pressure air sources, then system versatility is maintained, but device complexity increases
Solution Approach 1:
The patent extracts or removes redundant ducting and valve components that are no longer necessary when dynamic selection between high-pressure and low-pressure sources is implemented. By eliminating the need for parallel redundant pathways and associated control valves, the system maintains air source flexibility while significantly reducing structural complexity and weight.
Data Source
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AI summary
The present invention provides an air management system with a set of compressed air sources for selectively supplying pressurized air to air consumer equipment according to the aircraft operation condition. In particular, either low-pressure air, high-pressure air, or a combination thereof may perform such supplying of compressed air depending on the aircraft operation condition.