Loading...
Please wait, while we are loading the content...
Similar Documents
High temperature oxidation-resistant thruster research
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lansaw, P. Tina Wooten, John R. |
| Copyright Year | 1990 |
| Description | A program was conducted for NASA-LeRC by Aerojet Propulsion Division to establish the technology base for a new class of long-life, high-performance, radiation-cooled bipropellant thrusters capable of operation at temperatures over 2200 C (4000 F). The results of a systematic, multi-year program are described starting with the preliminary screening tests which lead to the final material selection. Life greater than 15 hours was demonstrated on a workhorse iridium-lined rhenium chamber at chamber temperatures between 2000 and 2300 C (3700 and 4200 F). The chamber was fabricated by the Chemical Vapor Deposition at Ultramet. The program culminated in the design, fabrication, and hot-fire test of an NTO/MMH 22-N (5-lbF) class thruster containing a thin wall iridium-lined rhenium thrust chamber with a 150:1 area ratio nozzle. A specific impulse of 310 seconds was measured and front-end thermal management was achieved for steady state and several pulsing duty cycles. The resulting design represents a 20 second specific impulse improvement over conventional designs in which the use of disilicide coated columbium chambers limit operation to 1300 C (2400 F). |
| File Size | 16053405 |
| Page Count | 324 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910006750 |
| Archival Resource Key | ark:/13960/t3518x092 |
| Language | English |
| Publisher Date | 1990-02-01 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Propulsion And Power Cycles Thin Walls Liquid Rocket Propellants High Temperature Research Engine Tests Steady State Niobium Oxidation Resistance Vapor Deposition Propulsion Thrust Chambers Specific Impulse Iridium Temperature Control Rhenium Liquid Propellant Rocket Engines Protective Coatings Disilicides 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 |
