The effects of metallized fuel composition on the combustion characteristics of solid fuel ramjets.
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Authors
Karadimitris, Adonis
Subjects
metallized fuels
solid fuel ramjets
solid fuel ramjets
Advisors
Netzer, David W.
Date of Issue
1986-12
Date
December 1986
Publisher
Language
en_US
Abstract
A series of experiments were conducted to investigate the effects of metallized
fuel composition on the combustion characteristics of solid fuel ramjets (SFRJ).
Metallized fuels were burned in a two dimensional SFRJ motor under conditions
similar to the actual flight conditions proposed for solid fuel ramjets. Pressure, air inlet
temperature and flowrate measurements were taken using an automatic data
acquisition system. High speed motion pictures were taken of the interior of the
combustor during the burning of the solid fuel through two viewing windows located in
the recirculation zone and just prior to the aft mixing chamber where the boundary
layer was more fully developed. Tests were conducted at mass fluxes of 0.2 and 0.5
lbm/in2
sec, with pressures ranging from 57 to 200 psia and with a nominal inlet air
temperature of 1100° R.
The surface of most fuels had a characteristic shedding of small, unignited flakes.
The flakes are thought to be binder material, and were more prevelent at lower
pressures. Occasional shedding of large surface layers was observed, especially during
motor shutdown. Metallic surface agglomerations appeared to interact strongly with
these irregular surface layers. Large magnesium particles exhibited the expected bright
ignition characteristics. Boron particles were not observed, apparently because they
were smaller than the resolution limits of the motion pictures.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
78 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner