Leaf-Structured Conduit Damper for Turbine Vibration Damping
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Solution Overview
Problem
Conduits extending through vanes in gas turbine engines are susceptible to natural vibration modes and resonance, leading to increased mechanical stresses and premature failure due to high velocity airflow and environmental conditions.
Innovation Solution
An energy dissipating damper with a body comprising a plurality of leaves, where the leaves are fixed at one end and separable at the other, made from resiliently flexible material, is coupled to the conduit and contacts the vane's inner surface to dissipate energy and inhibit resonant vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conduits are extended through structural vanes to protect from high velocity airflow, then protection from environmental conditions is improved, but susceptibility to natural vibration modes and resonance increases
Solution Approach 1:
The damper is segmented into multiple leaves that can move independently relative to each other. This segmentation allows the damper to effectively dissipate vibrational energy through inter-leaf friction while maintaining the conduit's protected position within the vane structure.
Solution Approach 2:
The damper transitions from a static structure to a dynamic one where the leaves can move and flex in response to vibrational forces. This dynamic capability allows the damper to adapt to varying vibration frequencies and amplitudes, effectively damping resonance while maintaining conduit protection.
2Reliability
If energy dissipating damper with multiple leaves is added to reduce vibrations, then damping effectiveness is improved, but device complexity increases
Solution Approach 1:
The damper utilizes thin leaf structures made from resiliently flexible material that can bend and flex to dissipate vibrational energy. These thin-film-like leaves provide effective damping while maintaining a relatively simple and compact overall structure that does not significantly increase device complexity.
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 energy dissipating damper reduces mechanical stresses and improves the operational life of conduits and vanes by effectively damping excessive and resonant vibrational frequencies.
Implementation Method 1
The plurality of leaves of the energy dissipating damper may include resiliently flexible material
Implementation Method 2
the energy dissipating damper reduces mechanical stresses and improves the operational life of conduits and vanes by effectively damping excessive and resonant vibrational frequencies
Data Source
AI summary
An energy dissipating damper includes a first end portion configured to be coupled to a first structure, a second end portion, opposite the first end portion, configured to contact a second structure, and a body portion extending from the first end portion to the second end portion. The body portion includes a plurality leaves. The plurality of leaves may be fixed together at the first end portion and may be separable from each other at the second end portion. In response to the energy dissipating damper being in a loaded state, the plurality of leaves may be in direct contact with each at the second end portion. The energy dissipating damper may further include a contact element coupled to the second end portion, and the contact element may comprise an abradable material.