Turbine Engine Core Bleed Port for Debris Separation
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Solution Overview
Problem
Existing systems for bleeding air from an aircraft engine flowpath are in need of improvement to enhance efficiency and debris management.
Innovation Solution
A turbine engine assembly with a bleed port that fluidly couples the flowpath to inner and outer passages in parallel, allowing for the separation of compressed air and debris, with the bleed port located between compressor sections and configured to direct air to a heat exchanger and a bypass flowpath.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air is bled from the flowpath using existing systems, then air can be removed from the engine core, but debris separation efficiency is insufficient and engine performance is compromised
Solution Approach 1:
The bleed port is divided into multiple openings arranged in a circular pattern, with each opening positioned at specific angular intervals. This segmentation allows different portions of the bleed port to handle different functions - separating debris from air while maintaining sufficient airflow for engine performance
Solution Approach 2:
The bleed port openings are strategically positioned at specific locations within the flowpath - radially outward from the centerline and at specific angular positions. This local placement optimizes debris capture in high-velocity regions while preserving airflow in critical areas, resolving the contradiction between debris separation and engine performance
2Object-generated harmful factors
If a bleed port is positioned to maximize debris removal, then debris can be effectively separated, but air cooling efficiency is reduced
Solution Approach 1:
The multiple openings arranged in a circular pattern create periodic airflow patterns as air passes through the bleed port. This periodic structure allows continuous debris removal while maintaining consistent cooling airflow distribution, preventing the trade-off between debris removal and cooling efficiency
Solution Approach 2:
The bleed port is positioned upstream in the flowpath before the air reaches critical cooling zones. This preliminary positioning allows debris to be separated early in the flowpath, preventing debris from reaching downstream components while still allowing sufficient time for cooling airflow to develop and maintain engine temperatures
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
Efficient separation of debris from compressed air, enabling effective cooling and debris removal, while maintaining engine performance and reducing potential damage.
Implementation Method 1
A turbine engine assembly with a bleed port that fluidly couples the flowpath to inner and outer passages in parallel, allowing for the separation of compressed air and debris
Implementation Method 2
direct air to a heat exchanger
Data Source
AI summary
An assembly is provided for a turbine engine. This assembly includes an engine core configured to drive rotation of a propulsor rotor. The engine core includes a first compressor section, a second compressor section, a flowpath, a bleed port, an inner passage and an outer passage. The first compressor section and the second compressor section are arranged axially along an axis. The flowpath extends longitudinally through the first compressor section and the second compressor section. The bleed port fluidly couples the flowpath to the inner passage and the outer passage in parallel. The bleed port is located longitudinally along the flowpath between the first compressor section and the second compressor section. The inner passage is arranged radially between the flowpath and the outer passage.