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Quick access rocket exhaust rig testing of coated grcop-84 sheets used to aid coating selection for reusable launch vehicles
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Raj, Sai V. |
| Copyright Year | 2005 |
| Description | The design of the next generation of reusable launch vehicles calls for using GRCop-84 copper alloy liners based on a composition1 invented at the NASA Glenn Research Center: Cu-8(at.%)Cr-4%Nb. Many of the properties of this alloy have been shown to be far superior to those of other conventional copper alloys, such as NARloy-Z. Despite this considerable advantage, it is expected that GRCop-84 will suffer from some type of environmental degradation depending on the type of rocket fuel utilized. In a liquid hydrogen (LH2), liquid oxygen (LO2) booster engine, copper alloys undergo repeated cycles of oxidation of the copper matrix and subsequent reduction of the copper oxide, a process termed "blanching". Blanching results in increased surface roughness and poor heat-transfer capabilities, local hot spots, decreased engine performance, and premature failure of the liner material. This environmental degradation coupled with the effects of thermomechanical stresses, creep, and high thermal gradients can distort the cooling channel severely, ultimately leading to its failure. |
| File Size | 169106 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050217185 |
| Archival Resource Key | ark:/13960/t3cz85z0b |
| Language | English |
| Publisher Date | 2005-06-01 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Performance Tests Copper Alloys Liquid Oxygen Rocket Exhaust Hydrogen Oxygen Engines Coating Liquid Hydrogen Reusable Launch Vehicles Heat Transfer Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
