The spray characteristics of standard and alternative aviation fuels generated by a hybrid pressure-swirl airblast atomizer were studied at conditions corresponding to near-lean blowout conditions: ambient gas pressure P vessel = 2.07    bar , fuel temperature T fuel = 322    K , and atomizing gas temperature T gas = 394    K . The candidate alternative fuels (C-1, C-5, C-7, and, C-8 synthetic blends) were compared to Jet-A (A-2). The drop size and drop velocity were measured using phase Doppler anemometry at three measurement planes downstream of the swirler exit. The representative diameters [ D 10 , D 32 , and the mass mean diameter (MMD)] were used to characterize the drop size. The drop velocity was characterized using the arithmetic mean and the root mean square. An increase in the swirler pressure drop ( Δ P / P ) showed a decrease in the mean drop size and an increase in the magnitude of the axial drop velocity. Comparing the different fuels generally showed an increase in D 10 for higher fuel viscosity. However, definitive trends in D 32 and the MMD were not observed, based on fuel physical properties such as viscosity, surface tension, or density. A variation of the fuel injection pressure Δ P Pilot showed no significant effect for both the standard and alternative fuels. The full cone angle (obtained using shadowgraph images) was found to not vary significantly with Δ P Pilot or Δ P / P .


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    Title :

    Nonreacting Spray Characteristics for Alternative Aviation Fuels at Near-Lean Blowout Conditions


    Contributors:

    Published in:

    Publication date :

    2019-12-20


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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