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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684
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SHEAR COAXIAL INJECTOR ATOMIZATION PHENOMENA FOR COMBUSTING AND NONCOMBUSTING CONDITIONS
ABSTRAKT
Measurements of liquid oxygen (LOX) drop size and velocity in a unielement liquid-propellant rocket chamber are presented along with complementary measurements of drop size/velocity for simulants under cold flow conditions. The drop size comparisons between the cold flow and hot-fire conditions showed that the drops were larger for combusting conditions. This observation is argued to be consistent with effects due to differences in the flow fields between hot-fire and cold flow conditions and more rapid vaporization of smaller drops under combusting conditions. The use of the phase Doppler particle analyzer (PDPA) in obtaining temporally averaged probability density functions of drop size in a harsh rocket environment has been demonstrated. The PDPA measurements indicate that the atomization process is characterized by either the presence of nonspherical liquid structures or the production of extensive dense drop regions under these conditions. Finally, the need for more extensive studies under a wider variety of chamber conditions is indicated.
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Rahman S., Pal S., Santoro R., Rahman S., Pal S., Santoro R., Critical issues for making droplet measurements in liquid oxygen/hydrogen combusting sprays, 33rd Joint Propulsion Conference and Exhibit, 1997. Crossref
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Ferraro M., Kujala R. J., Thomas J.-L., Glogowski M. J., Micci M. M., Near-Critical Liquid Oxygen Droplet Measurements, Journal of Propulsion and Power, 14, 4, 1998. Crossref
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Ferraro M., Kujala R. J., Thomas J.-L., Glogowski M. J., Micci M. M., Effects of GH/LOX Velocity and Momentum Ratios on Shear Coaxial Injector Atomization, Journal of Propulsion and Power, 18, 1, 2002. Crossref
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Yeralan S., Yeralan S., Pal S., Santoro R., Pal S., Santoro R., Major species and temperature profiles of LOX/GH2 combustion, 33rd Joint Propulsion Conference and Exhibit, 1997. Crossref
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Mardani A., Barani E., Numerical Investigation of Supercritical Combustion of H2–O2, Energy & Fuels, 32, 3, 2018. Crossref
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