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Molecular Beam Studies of Volatile Liquids and Fuel Surrogates Using Liquid MICR

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Technical Report,15 May 2010,31 Aug 2014

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The Board of Regents of the University of Wisconsin System MADISON United States

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Our motivation is to explore the heating, evaporation, and aging of volatile fuel droplets, which evaporate and combust at pressures and temperatures up to 30 atm and 2000 K in a jet engine. A microscopic, blow by blow description of these events can be obtained by monitoring the evaporation of liquid fuel inside a vacuum chamber and by bombarding it with ambient gases to measure collisional heating. We successfully carried out two separate sets of experiments over the grant period 1 studies of collisional heating of fuel droplets by ambient gases and 2 studies of super-Maxwellian helium evaporation from hydrocarbon liquids and jet fuels to investigate the packing and attractions of molecules at the surfaces of fuel droplets. During the course of these experiments, we developed the liquid microjet technique for investigating volatile liquids in vacuum-based scattering experiments.

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