FEASIBILITY DEMONSTRATION OF A TRANSPIRATION COOLED NOZZLE SYSTEM.
Abstract
Transpination cooled rocket nozzle system studies are presented. Bench tests were conducted to substantiate flow relationships, verify heat transfer analyses, evaluate the effect of infiltrants, and investigate particle impingement. Also, laboratory tests to determine the physical properties of porous tungsten were completed. The thermal stress analysis was refined to incorporate the Von Mises yield criterion and the effect of plastic flow and shape redistribution on the resulting stresses. The scale-up process to produce full size inserts was completed and three full size porous inserts thermal shock tested with no failures. Joining investigations were completed on brazing and welding tantalum directly to porous tungsten. As a part of this investigation, a study was initiated to determine the feasibility of welding tantalum to a dense tungsten ring which is embedded in the porous insert during the sintering process. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 14, 1963
- Accession Number
- AD0428168