The NEQAIR line-by-line radiation code has been incorporated into the DPLR Navier-Stokes flow solver such that the NEQAIR subroutines are now callable functions of DPLR. The coupled DPLR-NEQAIR code was applied to compute the convective and radiative heating rates over high-mass Mars entry vehicles. Two vehicle geometries were considered - a 15 m diameter 70-degree sphere cone configuration and a slender, mid-L/D vehicle with a diameter of 5 m called an Ellipsled. The entry masses ranged from 100 to 165 metric tons. Solutions were generated for entry velocities ranging from 6.5 to 9.1 km/s. The coupled fluids-radiation solutions were performed at the peak heating location along trajectories generated by the Traj trajectory analysis code. The impact of fluids-radiation coupling is a function of the level of radiative heating and the freestream density and velocity. For the high-mass Mars vehicles examined in this study, coupling effects were greatest for entry velocities above 8.5 km/s where the surface radiative heating was reduced by up 17%. Generally speaking, the Ellipsled geometry experiences a lower peak radiative heating rate but a higher peak turbulent convective heating rate than the MSL-based vehicle.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Coupled Fluids-Radiation Analysis of a High-Mass Mars Vehicle


    Contributors:
    Palmer, Grant (author) / Allen, Gary (author) / Tang, Chun (author) / Brown, Jim (author)

    Conference:

    AIAA Thermophysics Conference ; 2011 ; Honolulu, HI, United States


    Publication date :

    2011-06-27


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Coupled Fluids-Radiation Analysis of a High-Mass Mars Entry Vehicle

    Palmer, Grant / Prabhu, Dinesh / Tang, Chun et al. | AIAA | 2011


    Coupled Fluids-Radiation Analysis of a High-Mass Mars Entry Vehicle

    Palmer, Grant / Allen, Gary / Tang, Chun et al. | NTRS | 2011


    Absolute Radiation Measurement in High Mass Venus and Mars Entry Conditions

    Cruden, Brett / Prabhu, Dinesh / Martinez, Ramon et al. | AIAA | 2010


    Mars Ascent Vehicle flight analysis

    Desai, P. / Braun, R. / Engelund, W. et al. | AIAA | 1998


    Mars Ascent Vehicle Gross Lift-off Mass Sensitivities for Robotic Mars Sample Return

    Dux, Ian J. / Huwaldt, Joseph A. / McKamey, R. Steve et al. | NTRS | 2011