Variable Ejector Inlet Particle Separator for Gas Turbine
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Solution Overview
Problem
Gas turbine engines operating in environments with particulate matter face challenges such as erosion and clogging due to the inability of existing inlet particle separators to effectively separate particles from incoming air, leading to reduced engine performance and efficiency.
Innovation Solution
An inertial particle separator system that separates incoming air into cleaned and scavenge flows, utilizing a variable output ejector to enhance particle separation efficiency by varying the draw on the scavenge flowpath with a portion of the cleaned air as a motive fluid, optimizing the flow balance under different operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an inlet particle separator is employed to separate particles from incoming air, then particle removal effectiveness is improved, but engine performance and efficiency deteriorate due to flow disruption
Solution Approach 1:
A flow splitter is introduced as an intermediary component between the particle separator and the engine inlet. The flow splitter redirects a portion of the separated airflow back through the particle separator, creating a controlled recirculation that maintains separation effectiveness while managing overall flow to preserve engine performance
Solution Approach 2:
The system dynamically adjusts flow parameters by varying the amount of airflow redirected through the particle separator. By changing flow rates and distribution, the system optimizes the balance between particle removal effectiveness and engine performance under different operating conditions
2Ease of manufacture
If a fixed particle separator design is used, then manufacturing simplicity is improved, but adaptability to different operating conditions deteriorates
Solution Approach 1:
The system incorporates variable geometry elements including adjustable flow splitters and controllable valve mechanisms that allow the particle separator to adapt its flow distribution characteristics. This enables the same physical structure to optimize performance across different flight conditions, speeds, and environmental scenarios
Solution Approach 2:
The particle separator system is designed to perform multiple functions: primary particle separation, flow conditioning, and adaptive flow management. The flow splitter and control mechanisms enable the system to adjust its behavior based on operating conditions, making it universally applicable across different mission profiles
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 system effectively reduces particulate matter in the air flowing into the engine, minimizing erosion and clogging, while maintaining engine efficiency by maximizing particle separation and thrust production through optimized flow management.
Implementation Method 1
an inertial particle separator that separates incoming air into a cleaned air flow and a scavenge flow
Implementation Method 2
an ejector that provides a draw on a scavenge duct and entrains the scavenge flow into a charged flow
Data Source
AI summary
Embodiments include an inlet particle separator system for a gas turbine engine. The inlet particle separator system includes an inertial particle separator that separates incoming air into a cleaned air flow and a scavenge flow. Embodiments may also include an ejector that provides a draw on a scavenge duct and entrains the scavenge flow into a charged flow, e.g., such as the output of a first stage fan. The ejector may have a variable output.