Seventh Stage Compressor Rotor Blade Airfoil Profile
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Solution Overview
Problem
Current compressor designs for gas turbine engines, particularly in multi-stage axial compressors, face inefficiencies due to suboptimal airfoil profiles, which affect the compression process and overall performance across various stages.
Innovation Solution
The development of specific airfoil profiles for compressor rotor blades and stator vanes, defined by Cartesian coordinate values, optimized for specific stages and velocities, enhancing the compression efficiency and matching the operational conditions of the compressor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional airfoil profiles are used in multi-stage axial compressors, then the design is simpler and easier to manufacture, but the compression efficiency and energy transfer are suboptimal
Solution Approach 1:
The patent applies local quality by providing different airfoil profile geometries for different compressor stages. Each stage (first through seventh stages) has specifically tailored airfoil profiles with unique Cartesian coordinate values optimized for that stage's operating conditions. This allows each local region of the compressor to have the optimal airfoil shape for its specific velocity and pressure requirements, thereby maximizing compression efficiency without requiring overly complex designs throughout the entire system.
Solution Approach 2:
The patent employs parameter changes by defining airfoil profiles through specific Cartesian coordinate values (X, Y, Z) that can be precisely adjusted for each compressor stage. The airfoil geometry parameters are optimized for different velocities and stages, allowing systematic variation of shape parameters to improve compression efficiency while maintaining manufacturability through defined coordinate specifications.
2Power
If airfoil profiles optimized for specific velocities and stages are used, then energy transfer and pressure increase improve, but the design and manufacturing precision requirements increase
Solution Approach 1:
The patent manages manufacturing precision requirements by providing specific, discrete Cartesian coordinate values (X, Y, Z) for each airfoil profile. These defined parameters allow for precise reproduction of the optimized geometries through standard manufacturing processes. The coordinate-based definition system enables high precision energy transfer performance while maintaining practical manufacturability through explicit geometric specifications.
3Productivity
If suboptimal airfoil profiles are used, then the compressor design is more general and adaptable, but the overall system performance and operational efficiency decrease
Solution Approach 1:
The patent resolves the contradiction between operational efficiency and design flexibility by implementing local quality optimization. Instead of using a single general airfoil profile for all stages, the patent provides stage-specific profiles tailored to each compressor stage's operating conditions. This allows maximum operational efficiency at each local stage while the overall system maintains adaptability through the modular stage-by-stage optimization approach.
Data Source
AI summary
A system is provided, including an airfoil. The airfoil includes a first suction portion of a nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y, and Z of a suction side as set forth in TABLE I to a maximum of three decimal places, wherein the X and Y values of the suction side are coordinate values that couple together to define suction side sections of the first suction portion of the nominal airfoil profile at each Z coordinate value, the suction side sections of the first suction portion of the nominal airfoil profile are coupled together to define the first suction portion, the airfoil includes an airfoil length along a Z axis, the first suction portion comprises a first portion length along the Z axis, the first portion length is less than or equal to the airfoil length, and the Cartesian coordinate values of X, Y, and Z are non-dimensional values convertible to dimensional distances.