Viscous, Radiating Shock Layer about a Blunt Body

Hoshizaki, H.; Wilson, K. H.

doi:10.2514/3.55179

Cited by 24 publications

(2 citation statements)

References 5 publications

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“…Previous studies have highlighted the importance of accounting for the self-absorption on the shock layer even when the wall heat transfer is dominated by convection [37][38][39]. First, radiative emission and self-absorption can decrease the magnitude of the convective fluxes [38] and influence the shock stand-off distance when coupled strongly with ablating flows [39]. In this study the finite volume radiation model (which is a conservative variant of the discrete ordinates method) was employed to estimate (−∇ ⋅ ).…”

Section: Radiative Transfer Calculations and The Effect Of Trimentioning

confidence: 99%

Computationally Efficient Assessments of the Effects of Radiative Transfer, Turbulence Radiation Interactions, and Finite Rate Chemistry in the Mach 20 Reentry F Flight Vehicle

Krishnamoorthy

Clarke

2016

Journal of Computational Engineering

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Effects of finite rate chemistry, radiative heat transfer, and turbulence radiation interactions (TRI) are assessed in a fully coupled manner in simulations of the Mach 20 Reentry F flight vehicle. Add-on functions were employed to compute a Planck mean absorption coefficient and the temperature self-correlation term (for TRI effects) in the optically thin shock layer. Transition onset was induced by specifying a wall roughness height at the experimentally observed transition location. The chemistry was modeled employing eight elementary reactions and an equilibrium approach allowing species to relax towards their chemical equilibrium values over the process characteristic time scale. The wall heat fluxes in the turbulent region, density, and velocity profiles compared reasonably well against measurements as well as similar calculations reported previously. The density predictions were more sensitive to the choice of modeling options than the velocities. The radiative source term magnitude agreed closely with its measurements deduced from shock tube experiments. The TRI model predicted a 60% enhancement in emission due to temperature fluctuations in the turbulent boundary layer. While the variations in density and velocity predictions among the models diminished along the length of the body, the O and NO prediction variations extended well into the turbulent boundary layer.

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Section: Radiative Transfer Calculations and The Effect Of Trimentioning

confidence: 99%

Computationally Efficient Assessments of the Effects of Radiative Transfer, Turbulence Radiation Interactions, and Finite Rate Chemistry in the Mach 20 Reentry F Flight Vehicle

Krishnamoorthy

Clarke

2016

Journal of Computational Engineering

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“…5 shows the results of a cursory analysis for an Apollo-sized vehicle travelling at 18 km/sec at the altitude corresponding to a 10 # deceleration on the undershoot trajectory for the stagnation point. Obviously, the energy depletion is important at the higher radiation levels, and according to Seiff would be even more important off the stagnation point, as the analysis of Hoshizaki (11) indicates. However, it should be noted' 8 ' that energy fraction for optimum configurations is not changed from what had been predicted in refs.…”

Section: Radiative Heating Aspectsmentioning

confidence: 99%

Some Problems of Planetary Atmosphere Entry

Allen

1967

J. R. Aeronaut. Soc.

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Summary:—Progress in understanding the atmosphere heating problems of space vehicles at hyperbolic entry speeds is reviewed. The various sources of aerodynamic heating are discussed along with the response of suitable heat shield materials to these inputs. It is shown that even for optimum shaped vehicles the problems are formidable at entry speeds greatly in excess of Earth parabolic speed. Much additional research, particularly of ablation materials, will be needed to effect satisfactory designs for such craft.

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Entry Radiative Transfer

Moore

1968

Re-Entry and Planetary Entry Physics and Technology

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Viscous, Radiating Shock Layer about a Blunt Body

Cited by 24 publications

References 5 publications

Computationally Efficient Assessments of the Effects of Radiative Transfer, Turbulence Radiation Interactions, and Finite Rate Chemistry in the Mach 20 Reentry F Flight Vehicle

Computationally Efficient Assessments of the Effects of Radiative Transfer, Turbulence Radiation Interactions, and Finite Rate Chemistry in the Mach 20 Reentry F Flight Vehicle

Some Problems of Planetary Atmosphere Entry

Entry Radiative Transfer

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