Air-Inlet Duct Splitter for Gas Turbine Particle Separation
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Solution Overview
Problem
Gas turbine engines face wear and maintenance issues due to particle ingestion, such as dust and water, which are not effectively separated by existing inertial particle separation methods, leading to reduced performance and increased maintenance costs.
Innovation Solution
An air-inlet duct with a splitter and bypass flow system that separates air and particles into clean and dirty flows, using apertures and a flow regulator to control the size of the separated flow region, optimizing particle separation by adjusting bypass air flow based on pressure sensor measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inertial particle separation is used with a serpentine flow path, then particles are separated from air, but particles may still enter the engine channel due to flow recirculation and separation
Solution Approach 1:
The air-inlet duct is divided into separate functional channels: a scavenge channel for particle-laden flow and an engine channel for clean air flow. The splitter divides the serpentine flow path into distinct regions, ensuring particles are confined to the scavenge channel while clean air proceeds to the engine channel, preventing particle ingestion by the compressor
Solution Approach 2:
A bypass flow system with adjustable flow regulators is introduced as an intermediary mechanism to control the separated flow region. This bypass flow adjusts the size of the separated flow region to prevent recirculation and ensure particles remain in the scavenge channel, thereby improving separation reliability without compromising engine air quality
2Reliability
If the separated flow region size is not controlled, then particles may be recirculated upstream, but controlling the flow region adds system complexity
Solution Approach 1:
The bypass flow system incorporates adjustable flow regulators that dynamically control the size of the separated flow region. This dynamic adjustment capability allows the system to adapt to varying operating conditions, maintaining optimal particle separation efficiency while managing the complexity through controlled adaptability rather than static design
Solution Approach 2:
The flow regulators modify flow parameters (flow rate, pressure distribution) to control the size of the separated flow region. By changing these parameters, the system optimizes particle separation efficiency and prevents recirculation, justifying the added complexity through measurable performance improvements
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
Enhances particle separation efficiency, minimizing engine wear and maintenance costs by ensuring clean air reaches the compressor, while effectively directing particles to a scavenge channel, even under varying operating conditions.
Implementation Method 1
separation of flow from an outer wall of the air-inlet duct leading to recirculation of the particles
Implementation Method 2
Inertial particle separation uses the inertia of the particles to separate the particles from the air
Data Source
AI summary
An air-inlet duct includes an outer wall, an inner wall, and a splitter. The splitter cooperates with the outer wall and the inner wall to establish a particle separator which separates particles entrained in an inlet flow moving through the air-inlet duct to provide a clean flow of air to a compressor section of a gas turbine engine.