A Laboratory Investigation of Aerosol and Extinction Characteristics for SALTY DOG, NWC 29 and NWC 78 Pyrotechnics
Final rept. 11 Feb 1980-11 Feb 1981
CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY
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Calspan is conducting a limited investigation of the efficiency of hygroscopic aerosols in restricting visibility at subsaturated humidity. The artificial fogs are produced by SALTY DOG and phosphorus pentoxide smoke in Calspans 590 cubic meter chamber at controlled relative humidities of from 30 to 97 percent. Extinction at both visible and IR wavelengths, aerosol size spectra and pyrotechnic mass yield are compared as functions of humidity. Additionally, results of microscopically measured individual particle growth as a function of humidity and numerical estimates of downwind visibility reduction resulting from the burning of the Salty Dog pyrotechnic are presented.