NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Acid droplet generation in SRM exhaust cloudsA free energy analysis is applied to the co-condensation/evaporation of H2O and HCl vapors on wettable particles in open air in order to model droplet nucleation in solid rocket motor (SRM) exhaust clouds. Formulations are defined for the free energy change, the drop radius, the saturation ratio, the total number of molecules, and the mean molecular radius in solution, as well as the molecular volume and the concentration range. The free energy release in the phase transition for the AL2O3 nuclei in the SRM exhaust is examined as a function of the HCl molefraction and nucleating particle radius, based on Titan III launch exhaust cloud conditions 90 sec after ignition. The most efficient droplet growth is determined to occur at an HCl molefraction of 0.082 and a particle radius of 0.0000013 cm, i.e. a molality of 5.355.
Document ID
19840028154
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dingle, A. N.
(Michigan, University Ann Arbor, MI, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1983
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
AIAA PAPER 83-2615
Accession Number
84A10941
Funding Number(s)
CONTRACT_GRANT: NSG-1243
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available