A transpiration-cooled cone is investigated with respect to varying cooling mass flow along the surface caused by the orthotropic permeability of a ceramic composite material and varying wall thickness. The measurements comprise the dynamic pressure distribution at the cone surface, the reservoir pressure, and the overall mass flow rate. Material permeability depending on fiber orientation is measured on cylindrical samples. Furthermore, a numerical approach with the two-dimensional Darcy equation is presented to simulate the pressure loss across the orthotropic wall structure and the mass flow distribution along the surface. Finally, the results from the experiment and the simulation are compared and assessed with respect to the fiber orientation of the material. The resulting mass flow distributions demonstrate the flow dependence on the fiber orientation. Furthermore, the outflow behavior at the surface is investigated, focusing on the exhaust angle, and the results of the measurements coincide with the simulations. However, dependence on wall thickness is seen in simulations but not in measurements.


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    Title :

    Flowfield and Pressure Decay Analysis of Porous Cones


    Contributors:

    Published in:

    AIAA Journal ; 55 , 3 ; 874-882


    Publication date :

    2017-01-13


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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