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Ignition and combustion characteristics of metallized propellantsOver the past six months, experimental investigations were continued and theoretical work on the secondary atomization process was begun. Final shakedown of the sizing/velocity measuring system was completed and the aluminum combustion detection system was modified and tested. Atomizer operation was improved to allow steady state operation over long periods of time for several slurries. To validate the theoretical modeling, work involving carbon slurry atomization and combustion was begun and qualitative observations were made. Simultaneous measurements of aluminum slurry droplet size distributions and detection of burning aluminum particles were performed at several axial locations above the burner. The principle theoretical effort was the application of a rigid shell formation model to aluminum slurries and an investigation of the effects of various parameters on the shell formation process. This shell formation model was extended to include the process leading up to droplet disruption, and previously developed analytical models were applied to yield theoretical aluminum agglomerate ignition and combustion times. The several theoretical times were compared with the experimental results.
Document ID
19930011042
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Mueller, D. C. (Pennsylvania State Univ. University Park, PA, United States)
Turns, Stephen R. (Pennsylvania State Univ. University Park, PA, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Subject Category
Propellants And Fuels
Report/Patent Number
NAS 1.26:192231
TR-91-008
NASA-CR-192231
Accession Number
93N20231
Funding Number(s)
CONTRACT_GRANT: NAG3-1044
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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