A-B Plane PG Throat Inserts

An exploratory program was conducted to design and develop free standing a-b plane pyrolytic graphite throat inserts for rocket nozzles. Thermal analysis and structural analysis were conducted to define and establish design concepts for nozzle inserts. Free standing a-b plane continuously nucleated...

Full description

Saved in:
Bibliographic Details
Main Authors: Tomlinson, Philip A, Murray, James W, Bird, James O
Format: Report
Language:English
Subjects:
Ceramics, Refractories and Glass
COOLING
CRACKS
DELAMINATION
FABRICATION
FAILURE
FRACTURE(MECHANICS)
NOZZLE INSERTS
NOZZLE THROATS
NUCLEATION
PE63305A
PYROLYTIC GRAPHITE
RESIDUAL STRESS
ROCKET NOZZLES
Solid Propellant Rocket Engines
STRESS ANALYSIS
STRUCTURAL ANALYSIS
THERMAL ANALYSIS
WUAFRPL672A00HG
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An exploratory program was conducted to design and develop free standing a-b plane pyrolytic graphite throat inserts for rocket nozzles. Thermal analysis and structural analysis were conducted to define and establish design concepts for nozzle inserts. Free standing a-b plane continuously nucleated pyrolytic graphite cylinders were fabricated and characterized to determine the thermal and mechanical properties over range of temperatures from 70 F to 5000 F. Failure criteria were investigated and the predictions were compared with the results of pyrolytic graphite throat inserts which fractured during cooldown. The throat insert configuration was defined and thirteen deposition runs were made to produce the throat inserts. All inserts fabricated were unacceptable for nozzle testing due to cracks and/or delaminations which occurred during cooldown.