Nanocellular foam damper
A machine includes a section that defines a target vibrational mode to dampen and a nanocellular foam damper that includes interconnected ligaments in a cellular structure. The interconnected ligaments have an average ligament size defined with respect to a vibrational loss modulus of the nanocellular foam damper and the target vibrational mode. Also disclosed is a method of damping vibration.
1. A turbomachine comprising: a section of the turbomachine, the section having a target vibrational mode to dampen, the section including a nanocellular foam damper having interconnected ligaments in a cellular structure, the interconnected ligaments having ligament properties defined with respect to a loss modulus and tan δ (tan delta) of the nanocellular foam damper and the target vibrational mode, wherein the ligament size is a width dimension, and the width dimension is less than 1000 nanometers, wherein the nanocellular foam damper is fully enclosed in a solid shell.
2. The machine as recited in claim 1 , wherein the nanocellular foam damper is bonded to the solid shell.
3. The machine as recited in claim 2 , wherein the interconnected ligaments and the solid shell are metals, and the metals are different.
4. The machine as recited in claim 1 , wherein the ligament is composed of nano-materials.
5. The machine as recited in claim 1 , wherein the width dimension is less than 100 nanometers.
6. The machine as recited in claim 1 , wherein the interconnected ligaments include at least one metal.
7. The machine as recited in claim 4 , wherein the at least one metal is selected from the group consisting of manganese, titanium, tungsten, vanadium, niobium, hafnium, tantalum, rhenium, ruthenium, iridium, palladium, platinum, zirconium, cobalt, yttrium, copper, molybdenum, aluminum, chromium, iron, nickel, and combinations thereof.
8. The machine as recited in claim 1 , wherein the interconnected ligaments include at least one ceramic material that is a silicon carbide, silicon nitride or metal silicide.
9. The machine as recited in claim 1 , wherein the interconnected ligaments include at least one ceramic filler material as a coating or mixture.
10. The machine as recited in claim 1 , wherein the interconnected ligaments and the solid shell are metals.
11. The machine as recited in claim 10 , wherein the metals are different.
12. The machine as recited in claim 1 , wherein the nanocellular foam damper is a uniform thickness coating.
13. A gas turbine engine comprising: a compressor section; a combustor arranged in communication with the compressor section; and a turbine section arranged in communication with the combustor, the compressor section, the combustor and the turbine section defining a core flow path, wherein at least a portion of the core flow path is configured to be operable at a temperature of 300° C. or greater, the portion having a component including a nanocellular foam vibration damper having interconnected ligaments in a cellular structure, the interconnected ligaments having ligament properties defined with respect to a loss modulus and tan δ (tan delta) of the nanocellular foam damper and a target vibrational mode, wherein the ligament size is a width dimension, and the width dimension is less than 1000 nanometers, wherein the nanocellular foam damper is fully enclosed in a solid shell.
14. The gas turbine engine as recited in claim 13 , wherein the interconnected ligaments include a material selected from the group consisting of metals, ceramic materials, and combinations thereof.