Application of laser schilieren and monochromatic photography to solid propellant combustion research.

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Author
Klahr, Owen Allen
Date
1973-12Advisor
Netzer, David W.
Second Reader
Fuhs, Allen E.
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Show full item recordAbstract
Ammonium perchlorate (AP) -binder sandwiches and a composite
propellant were burned in a combustion bomb at various
pressures. A schlieren system equipped with an argon laser
was used to study the flame structure. High speed monochromatic
motion pictures of solid propellant were taken during
combustion, and ammonium perchlorate-binder interactions were
investigated. ' It was found that the laser source combined
with a laser line filter allowed examination of the density
gradient in the flame front. However, a good schlieren record
could not be obtained at high power levels. The major
problems were: (1) a "speckle" background effect on the high
speed recording film, and (2) severe fringe pattern interference
due to knife-edge problems and turbulence effects caused
by the burning propellant. The monochromatic pictures demonstrated
that propellants without opacifiers cannot be effectively
examined for surface interactions during combustion
when using high intensity laser light.
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