TY - GEN

T1 - Comparative computation of radiative heating environment for huygens probe entry flight

AU - Osawa, Hiroshi

AU - Matsuyama, Shingo

AU - Ohnishi, Naofumi

AU - Sawada, Keisuke

PY - 2006/12/21

Y1 - 2006/12/21

N2 - Numerical simulations of Huygens probe entry flowfield are carried out using the thermochemical nonequilibrium code loosely coupled with one-dimensional and three-dimensional radiative transfer. A modern multi-band model is used in the radiation calculation. In one-dimensional radiation calculation, the tangent-slab approximation is employed. In three-dimensional radiation calculation, on the other hand, the ray-tracing approach is employed in the direction of the Gauss quadrature point for the integration of the radiative intensity over the solid angle. In the tangent-slab approximation, the calculated radiative heat flux values agree well with those given by the previous Huygens probe entry flowfield prediction. In three-dimensional radiative transfer calculation, the radiative heat flux at the stagnation point becomes about 25% smaller than that given by the tangent-slab approximation due to the body curvature. On the other hand, the extent of reduction of the radiative heat flux values from those given by the tangent-slab approximation around the mid-cone region becomes less than that around the stagnation region.

AB - Numerical simulations of Huygens probe entry flowfield are carried out using the thermochemical nonequilibrium code loosely coupled with one-dimensional and three-dimensional radiative transfer. A modern multi-band model is used in the radiation calculation. In one-dimensional radiation calculation, the tangent-slab approximation is employed. In three-dimensional radiation calculation, on the other hand, the ray-tracing approach is employed in the direction of the Gauss quadrature point for the integration of the radiative intensity over the solid angle. In the tangent-slab approximation, the calculated radiative heat flux values agree well with those given by the previous Huygens probe entry flowfield prediction. In three-dimensional radiative transfer calculation, the radiative heat flux at the stagnation point becomes about 25% smaller than that given by the tangent-slab approximation due to the body curvature. On the other hand, the extent of reduction of the radiative heat flux values from those given by the tangent-slab approximation around the mid-cone region becomes less than that around the stagnation region.

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M3 - Conference contribution

AN - SCOPUS:33845531084

SN - 1563478153

SN - 9781563478154

T3 - Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings

SP - 2299

EP - 2309

BT - Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings

T2 - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings

Y2 - 5 June 2006 through 8 June 2006

ER -