Numerical investigation of oscillations in nonequilibrium two-phase flows with a model for homogeneous nucleation in Laval nozzles is presented. The model, implemented within an Eulerian-Eulerian reference frame, is formulated using classical nucleation theory. Results by two-dimensional and three-dimensional methods are presented and compared, showing the accuracy of the predicted frequency and the pressure amplitude by a two-dimensional method. Emphasis is placed on oscillating flows in a variety of nozzle geometries, covering a range of inlet conditions. Dependences of frequency on inlet stagnation subcooling demonstrate that the occurrence of the asymmetric mode for pure steam flow is not exclusive to a specific nozzle geometry and inlet condition, which could be deferred by increasing the expansion rate and decreasing the inlet pressure.


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    Title :

    Numerical Investigation of Oscillating Flows with Nonequilibrium Condensation in Nozzles



    Published in:

    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.50 Luftfahrzeugtechnik / 55.50
    Local classification TIB:    770/7040