Adaptive-Area Hub Particle Separator for Gas Turbine Inlet
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Solution Overview
Problem
Gas turbine engines face wear and maintenance issues due to particles like dust, sand, and water entering the compressor, leading to decreased power output and increased downtime, as existing particle separation methods are inefficient in austere conditions.
Innovation Solution
A particle separator with an adaptive-area hub and splitter that adjusts its geometry based on particle presence, using a control system to move between non-austere and austere positions to optimize flow area and encourage particle separation, featuring a radially variable geometry hub that increases flow turning only when particulates are present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the inlet passageway area is increased to reduce pressure loss in non-austere conditions, then pressure loss decreases, but particle separation efficiency deteriorates
Solution Approach 1:
The particle separator employs an adaptive-area hub with movable inner slats that dynamically adjust the inlet passageway area based on operating conditions. In non-austere conditions, the hub assumes a first configuration with larger area to minimize pressure loss. In austere conditions with particles present, the hub transitions to a second configuration with smaller area to enhance particle separation efficiency, thus resolving the contradiction between pressure loss and separation efficiency.
Solution Approach 2:
The system changes the geometric parameter of the inlet passageway area by moving the adaptive-area hub between two positions. This parameter change allows the system to optimize for pressure loss reduction when particles are absent, and for particle separation enhancement when particles are present, effectively managing the trade-off between these two competing requirements.
2Reliability
If the inlet passageway area is decreased to improve particle separation in austere conditions, then particle separation efficiency improves, but pressure loss increases
Solution Approach 1:
The adaptive-area hub provides dynamic adjustment capability, allowing the system to switch between a compact configuration for particle separation and an expanded configuration for pressure loss reduction. This dynamic adaptation ensures that the system operates optimally for the current environmental conditions, resolving the energy efficiency contradiction.
3Device complexity
If a fixed geometry particle separator is used, then device complexity is reduced, but adaptability to different operating conditions deteriorates
Solution Approach 1:
The particle separator incorporates a movable adaptive-area hub that can transition between different geometric configurations. This dynamic structure enables the system to adapt to both austere and non-austere operating conditions, overcoming the limitation of fixed geometry designs while maintaining reasonable structural complexity through the use of a controlled movement mechanism.
Solution Approach 2:
The adaptive-area hub serves multiple functions: it acts as a structural support element, a flow control mechanism, and an adaptive geometry adjustment device. This multi-functionality allows the particle separator to handle diverse operating conditions effectively without requiring entirely separate systems for different environments.
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
Effectively separates particles from air, minimizing engine damage and maintaining performance by adjusting flow area to maximize particle capture in austere conditions while maintaining low pressure loss in non-austere conditions.
Implementation Method 1
Inertial particle separation uses the inertia of the particles to separate the particles from the air
Data Source
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AI summary
A particle separator (12, 212) adapted for use with a gas turbine engine (10, 210) includes an adaptive-area hub (22, 222), an outer wall (24, 224), and a splitter (26, 226). The splitter cooperates with the adaptive-area hub and the outer wall to separate particles suspended in an inlet flow moving through the particle separator to provide a clean flow of air (40) to the gas turbine engine.