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Solid rocket motor plume particle size measurements using multiple optical techniques in a probe

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Author
Manser, John R.
Date
1995-03
Advisor
Netzer, David W.
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Abstract
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.
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This 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.
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http://hdl.handle.net/10945/7541
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  • 1. Thesis and Dissertation Collection, all items

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    Investigation of the effects of solid rocket motor propellant composition on plume signature 

    Snaza, Clay J. (Monterey, California. Naval Postgraduate School, 1994-06);
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  • Thumbnail

    Subscale solid rocket motor infrared signature and particle behavior. 

    Racine, John A. (Monterey, California. Naval Postgraduate School, 1991-12);
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    The effects of nozzle geometry on particle size distribution in a small two dimensional rocket motor 

    Brennan, William Dennis (Monterey, California. Naval Postgraduate School, 1989-09);
    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 ...
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