The Fay-Riddell formulae, used to compute the heat flux at the stagnation point of spherical bodies in very high speed, laminar flow and dissociating air, have been revived and recast. As these formulae were obtained by fitting a number of results of the original Fay-Riddell computing procedure, which suffered from inaccuracies concerning operative parameters, it is to be expected that these inaccuracies also influence the correctness of the formulae. A sensitivity analysis has been made in order to identify the most critical parameter. Recast formulae have been calibrated using the results of the improved version of the Fay-Riddell computing procedure and then validated both by numerical results of a Navier-Stokes code and by experimental data. For this purpose two sets of heat flux measurements have been made in HEBDAF (high enthalpy blown-down arc facility) at the University of Naples, matching the operating conditions of the formula for a frozen boundary layer and non-catalytic wall. Recast formulae are valid in the range of free-stream total enthalpy between 3 and 37 MJ/kg.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Recasting the Fay-Riddell formulae for computing the stagnation point heat flux


    Contributors:
    Zuppardi, G (author) / Esposito, A (author)


    Publication date :

    2000-02-01


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






    Air High-Enthalpy Stagnation Point Heat Flux Calculation

    F. De Filippis / M. Serpico | AIAA | 1998


    Characterization of Stagnation-Point Heat Flux for Earth Entry

    Brandis, Aaron M. / Johnston, Christopher O. | AIAA | 2014


    Improved FayRiddell Procedure to Compute the Stagnation Point Heat Flux

    Gennaro Zuppardi / Gianpaolo Verde | AIAA | 1998