Thermal Isolation of Solid Rocket Motor Exit Cone and Nozzle

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$149,998.00
Award Year:
2013
Program:
SBIR
Phase:
Phase I
Contract:
HQ0147-13-C-7360
Award Id:
n/a
Agency Tracking Number:
B122-027-0167
Solicitation Year:
2012
Solicitation Topic Code:
MDA12-027
Solicitation Number:
2012.2
Small Business Information
AL, Huntsville, AL, 35811-1558
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
799114574
Principal Investigator:
DanielButts
Materials Engineer
(256) 851-7653
dbutts@plasmapros.com
Business Contact:
TimothyMcKechnie
President
(256) 851-7653
timmck@plasmapros.com
Research Institute:
Stub




Abstract
Current strategic solid rockets motors, such as the SM-3 third stage rocket motor (TSRM), employ highly aluminized propellants with gas temperatures of approximately 6,500F. Carbon-carbon nozzle throats and carbon cloth phenolic (CCP) exit cones are commonly used to manage the propellant exhaust. However, heat transfer from these components to the nozzle housing and exit cone bond-line joint currently limit mission profiles. This limitation is exacerbated in dual pulse motors with additional heat soak between pulses. To address this issue, a thermal barrier on the exterior exit cone and nozzle is proposed. This solution enables greater mission range and flexibility by minimizing heat transfer to the exit cone bond-line and adjacent bearing components. For dual-pulse motors, limiting the thermal soak will extend mission flexibility by allowing for a longer inter-pulse delay. During a Phase I effort, the team of Plasma Processes, Dynetics, ATK, and Aerojet will investigate the development and application of thermal barriers on CCP exit cones. Heat transfer analyses will be conducted to define effective structure and locations and estimate performance improvement. Following thermal analyses, a series of manufacturing demonstrations will be performed. Simulated TSRM nozzle sections with thermal barriers will be evaluated via high heat flux testing.

* information listed above is at the time of submission.

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