Accession Number:

AD0738622

Title:

Material Performance of Carbon Phenolic Ablators and Pyrolytic Graphite Coatings in Nozzles Subjected to Multiple Pulse Duty Cycles

Descriptive Note:

Final rept.

Corporate Author:

AEROTHERM ACUREX CORP MOUNTAIN VIEW CA

Personal Author(s):

• Wool, Mitchell R.
• Baker, Duane L.
• Murphy, Andrew J.

Report Date:

1971-10-01

Pagination or Media Count:

158.0

Abstract:

Measurements and analysis of the thermal and ablative response of five multiple pulse duty cycle rocket nozzles were performed. Nozzles were fired on a solid propellant simulator with a test stream composition, designated ANB-3066, which contained 16 percent aluminum. Nominal chamber pressure for each of the various firing pulses was 750 psia. Material temperature histories were recorded at several locations in each nozzle. Post-test measurements of surface recession, char penetration, and density versus depth, as well as thermocouple data are used for comparison with one and two-dimensional heat conduction and material ablation calculations.

Descriptors:

• *ABLATION
• *SOLID PROPELLANT ROCKET ENGINES
• *ROCKET NOZZLES
• *PYROLYTIC GRAPHITE
• *REFRACTORY COATINGS
• *CARBON
• PHENOLIC PLASTICS
• THERMAL ANALYSIS
• PYROLYSIS
• REACTION KINETICS

Subject Categories:

• Ceramics, Refractories and Glass
• Coatings, Colorants and Finishes
• Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE