The boundary-layer transition characteristics and convective aeroheating levels on mid lift-to-drag ratio entry vehicle configurations have been studied through wind-tunnel testing. Several configurations were investigated, including elliptically blunted cylinders with both circular and elliptically flattened cross sections, biconic geometries based on launch vehicle dual-use shrouds, and parametrically optimized analytic geometries. Vehicles of this class have been proposed for high-mass Mars missions, such as sample return and crewed exploration, for which the conventional sphere-cone entry-vehicle geometries of previous Mars missions are insufficient. Testing was conducted at Mach 6 over a range of Reynolds numbers sufficient to generate laminar, transitional, and turbulent flow. Transition onset locations, both straight-line and cross-flow, and heating rates were obtained through global phosphor thermography. Supporting computations were performed to obtain heating rates for comparison with the data. Laminar data and predictions agreed to well within the experimental uncertainty. Fully turbulent data and predictions also agreed well. However, in transitional flow regions, greater differences were observed.


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    Title :

    Laminar, Transitional, and Turbulent Heating on Mid Lift-to-Drag Ratio Entry Vehicles


    Contributors:

    Conference:

    AIAA Fluid Dynamics Conference and Exhibit ; 2012 ; New Orleans, LA, United States



    Publication date :

    2013-06-04


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :






    LAMINAR, TRANSITIONAL, AND TURBULENT HEATING ON MID LIFT-TO-DRAG RATIO ENTRY VEHICLES

    Hollis, B. / Hollingsworth, K. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2012