This work presents an approach to the design, and successful experimental validation, of a slug-type calorimeter for long-duration high-enthalpy flows. Specifically, a ceramic shell is used to insulate the slug. Although slug calorimeters have been widely used in arcjets for decades, significant uncertainties are known to be associated with these instruments, which directly affect the uncertainty of critical derived flow quantities such as specific enthalpy. A detailed analysis of the newly proposed design approach is presented. Particular attention has been devoted to the minimization of heat losses from the slug to the shroud, one of the major contributors to the instrument’s uncertainty. The effect of the shroud geometry, insulation thickness, and slug dimensions have been investigated numerically; variable thermophysical properties, nonuniform heat fluxes, and radiation were considered. The analysis showed that the shroud geometry plays a significant role in the heat losses. Based on this design approach, a calorimeter was manufactured to be used in the Office of Naval Research (ONR)–University of Texas at Arlington (UTA) arc-heated wind tunnel “Leste” facility. Experimental measurements in flows with bulk enthalpies up to 4 MJ/kg showed good agreement with the numerical simulations, and measured heat losses were well below the American Society for Testing and Materials standard recommendation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Ceramic Insulated Slug Calorimeter for High- Enthalpy Flows


    Contributors:

    Published in:

    Publication date :

    2021-10-19


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Ceramic Insulated Slug Calorimeter for High Enthalpy Flows

    Viganò, Davide / Raybon, Ian / Maddalena, Luca | AIAA | 2020


    CERAMIC INSULATED SLUG CALORIMETER FOR HIGH ENTHALPY FLOWS

    Vigano, Davide / Raybon, lan / Maddalena, Luca | TIBKAT | 2020


    Investigation of Slug Calorimeter Gap Influence for Plasma Stream Characterization

    Nawaz, Anuscheh / Gorbunov, Sergey / Terrazas-Salinas, Imelda et al. | AIAA | 2012


    New Data Reduction Equation for Diamond Slug Calorimeter Heat Transfer Gauges

    Frankel, J. I. / Geraets, Rowland T. Penty / McGilvray, M. et al. | AIAA | 2020


    Diagnostics of high enthalpy plasma flows

    Auweter-Kurtz, Monika / Habiger, Harald / Wegmann, Thomas | AIAA | 1997