Additive-Manufactured Turbine Engine Ducts for Complex Routing
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Solution Overview
Problem
Turbine engine duct assemblies face limitations due to manufacturing constraints, leading to increased weight and inefficiency, particularly in accommodating complex geometries and dynamic thermal loading requirements.
Innovation Solution
The use of metal tubular elements with varying wall thickness and cross-sections, formed through additive manufacturing, allowing for localized mechanical and thermal properties, and incorporating tight bends and unique profiles to enhance flexibility and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional manufacturing methods are used for duct assemblies, then manufacturing capability and cost are limited, but weight increases and efficiency decreases
Solution Approach 1:
The patent applies parameter changes by transitioning from traditional subtractive or formable manufacturing methods to additive manufacturing. This enables the creation of complex geometries with varying wall thicknesses and cross-sections that cannot be achieved with conventional methods, directly reducing weight while improving manufacturability of complex shapes
Solution Approach 2:
The patent utilizes composite material approaches by creating duct assemblies with non-uniform wall thickness distributions and varying cross-sectional profiles. These variations allow optimization of material placement to achieve required structural integrity with minimum weight, while the additive manufacturing process enables complex internal geometries that function as integrated structural-thermal management systems
2Adaptability or versatility
If duct assemblies are designed with complex geometries to accommodate engine components, then spacing requirements are met, but manufacturing complexity increases
Solution Approach 1:
The patent employs parameter changes by utilizing additive manufacturing to create ducts with continuously varying geometries, including non-uniform wall thicknesses and complex cross-sectional profiles. This allows the duct to adapt to tight spacing requirements and accommodate various engine components while the single-step manufacturing process avoids the complexity of assembling multiple simple components
Solution Approach 2:
The patent merges multiple functional requirements into a single integrated duct structure. By combining varying wall thickness regions, different cross-sectional profiles, and complex routing paths into one monolithic additive-manufactured component, the design achieves high adaptability to engine layouts without increasing overall device complexity through assembly
3Strength
If uniform wall thickness is used in ducts, then manufacturing is simpler, but localized mechanical and thermal properties cannot be optimized
Solution Approach 1:
The patent applies local quality by creating ducts with non-uniform wall thicknesses and varying cross-sectional profiles tailored to specific locations. Thicker walls are placed in regions requiring higher structural integrity or thermal resistance, while thinner walls are used where loads are lower, optimizing both strength and thermal performance. The additive manufacturing process enables this localized property variation without complicating production
Solution Approach 2:
The patent utilizes parameter changes by systematically varying wall thickness and cross-sectional dimensions along the duct length based on local mechanical and thermal requirements. This allows optimization of structural integrity in high-stress regions while maintaining manufacturing simplicity through a single additive manufacturing process that inherently accommodates geometric variations
Data Source
AI summary
A duct for a turbine engine, such as a gas turbine engine, can be utilized to carry a fluid from one portion of the engine to another. The duct can include a metallic tubular element having one of a varying wall thickness, a varying cross section, or a tight bend. Such a duct can be formed utilizing additive manufacturing or metal deposition on an additively manufactured mandrel.