Solid rocket motor plume particle size measurements using multiple optical techniques in a probe
Manser, John R.
Netzer, David W.
MetadataShow full item record
An experimental investigation to measure particle size distributions in the plume of sub-scale solid rocket motors was conducted. A phase-Doppler particle analyzer (pDPA) in conjunction with three-wavelength extinction measurements were used in a specially designed particle collection probe in an attempt to determine the entire plume particle size distribution. In addition, a laser ensemble particle sizer was used for comparative data. The PDPA and Malvem distributions agreed in the observed modes near 1 and 4.5 mm diameter (d). Scanning Electron Microscope (SEM) pictures of collected particles were in good agreement with the measured Malvem Sauter Mean diameter (d,%) of 2.59 mm. Data analysis indicate that less than 3% of the total mass of the particles was contained in particles with diameter d <0.5 mm. Therefore, the PDPA, which can typically measure particles down to a minimum diameter of 0.5 mm with a dynamic range (d max:d min) of 50:1, can be used by itself to determine the particle size distribution. Multiple wavelength measurements were found to be very sensitive to inaccuracies in the measured transmittances.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Snaza, Clay J. (Monterey, California. Naval Postgraduate School, 1994);Three propellants with aluminum/silicon weight percentages of 18/0%, 13.5/4.5%, and 12/6% were fired in a subscale motor to determine if the plume infrared signature could be reduced without a significant loss in specific ...
Racine, John A. (Monterey, California. Naval Postgraduate School, 1991-12);A combined optical and particle collection probe which employed an in situ particle size distribution measurement method and an infrared camera were used to obtain data that could be used to validate solid propellant ...
The effects of nozzle geometry on particle size distribution in a small two dimensional rocket motor Brennan, William Dennis (Monterey, California. Naval Postgraduate School, 1989);Laser diffraction particle sizing was conducted at the nozzle entrance, inside the nozzle, and in the exhaust plume of a small two-dimensional rocket motor using two different metallized propellants to determine the effects ...