An Aerometrics Phase Doppler and Particle Analyzer with Frequency Shifting (PDPA/FS) and the University of Nebraska Center for Electro-Optical Measurements Laser Imaging and Video Processing System (LI/VPS) were used to perform a detailed analysis of a NASA MOD-1 nozzle. These results were compared to the results obtained using an earlier version of the Phase Doppler and Particle Analyzer (P/DPA). The spray plume was analyzed under two sets of operating conditions. For Case I, a water pressure of 105 psia (723.95 kPa) and air pressure of 65 psia (448.16 kPa), and for Case II, a water pressure of 115 psia (792.90 kPa) and air pressure of 45 psia (310.27 kPa) were selected. Results for Case I indicated a deviation in arithmetic mean diameter (AMD) ranging from 0.1 to 2.8 μm, and in Sauter mean diameter (SMD) of 0.1 to 3.2 μm. For Case II, the deviation in AMD ranged from 0.4 to 7.1 μm, and for SMD from 0.2 to 8.2 μm.

Topics
Optical metrology, Laser imaging
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1988
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