Turbine Engine Inducer Assembly for Reduced-Particle Cooling
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Solution Overview
Problem
Turbine engines face issues with particle contamination in cooling air, leading to reduced operational time and lifespan due to clogging and obstruction of turbine blades by dirt, dust, and other environmental contaminants.
Innovation Solution
Incorporation of particle separators, such as centrifugal and inertial separators, into the bypass cooling circuit to remove particles from the cooling air flow, utilizing forces like centrifugal, gravitational, and inertial forces to separate particles before they reach critical engine components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling air is ducted from compressors to turbine blades, then cooling efficiency is improved, but particle contamination causes clogging and reduced operational time
Solution Approach 1:
The particle separator is installed in the bypass cooling circuit upstream of the turbine blades to remove particles from the cooling air before it reaches the blades. This preliminary action prevents particle accumulation and clogging, thereby maintaining cooling efficiency over extended operational periods without requiring frequent shutdowns for maintenance.
Solution Approach 2:
The particle separator acts as an intermediary device in the cooling air path, using centrifugal and inertial forces to separate and remove particles from the cooling air stream. This intermediary component protects the turbine blades from direct exposure to contaminated cooling air, resolving the contradiction between maintaining cooling efficiency and extending operational time.
2Reliability
If particles are removed from cooling air using separators, then particle concentration is reduced, but device complexity increases
Solution Approach 1:
The particle separator utilizes pneumatic principles by employing centrifugal force generated through rotational motion and inertial forces within the flow path to separate particles from the cooling air. This approach avoids complex mechanical moving parts while achieving effective particle removal, thereby enhancing component durability without significantly increasing system complexity.
Solution Approach 2:
The particle separator changes the flow parameters of the cooling air by creating regions of different velocities and pressures that exploit inertial differences between particles and air molecules. This parameter-based separation method achieves reliable particle removal while maintaining a relatively simple device structure, as it relies on fluid dynamic principles rather than complex mechanical systems.
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 cooling efficiency and durability of engine components by reducing particle concentration in the cooling air, allowing for effective utilization of both reduced-particle and concentrated-particle streams within the engine.
Implementation Method 1
a centrifugal separator, which may be rotated at high speed to remove particles from the cooling air flow
Implementation Method 2
an inertial separator, in which air is forced to change direction, thereby removing particles from the cooling air flow using inertial forces
Implementation Method 3
utilizing forces like centrifugal, gravitational, and inertial forces to separate particles before they reach critical engine components
Data Source
AI summary
A turbine engine having a compressor section, a combustor section, a turbine section, and a rotatable drive shaft. A bypass conduit couples the compressor section to the turbine section. At least one centrifugal separator is fluidly coupled to the bypass stream, where the at least one centrifugal separator includes a body, a center body, a separator inlet, and a separator outlet fluidly coupled with the turbine section to output a reduced-particle stream that is provided to the turbine section for cooling. The centrifugal separator includes an angular velocity increaser, a flow splitter, a first outlet passage defined by an inner annular wall that receives the reduced-particle stream, and an angular velocity decreaser located downstream of the flow splitter. A second outlet passage receives the concentrated-particle stream.