Accession Number : AD0428168


Title :   FEASIBILITY DEMONSTRATION OF A TRANSPIRATION COOLED NOZZLE SYSTEM.


Descriptive Note : Interim rept. no. 2, 15 Sep-14 Dec 63.


Corporate Author : TRW INC CLEVELAND OHIO


Report Date : 14 Dec 1963


Pagination or Media Count : 67


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)


Descriptors :   *ROCKET NOZZLES , SWEAT COOLING , FEASIBILITY STUDIES , REFRACTORY MATERIALS , POROSITY , TUNGSTEN , PERMEABILITY , NITROGEN , NOZZLE INSERTS , THERMAL EXPANSION , TEMPERATURE , SILVER , BRAZING , JOINTS , TANTALUM , WELDING , CONFIGURATIONS , COOLANTS , FLUID FLOW , THERMAL STRESSES , METALLURGY


Distribution Statement : APPROVED FOR PUBLIC RELEASE