13,327 research outputs found

    Formulation of a method for predicting coupled convective and radiative heat transfer about a blunt body

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    Method for predicting coupled convective and radiative heat transfer about blunt bod

    The effects of shock layer radiation and viscous coupling on the total heating rate to a reentering blunt body

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    Coupling radiative and convective heat transfer in hypersonic blunt body reentr

    SRB ascent aerodynamic heating design criteria reduction study, volume 1

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    An independent set of solid rocket booster (SRB) convective ascent design environments were produced which would serve as a check on the Rockwell IVBC-3 environments used to design the ascent phase of flight. In addition, support was provided for lowering the design environments such that Thermal Protection System (TPS), based on conservative estimates, could be removed leading to a reduction in SRB refurbishment time and cost. Ascent convective heating rates and loads were generated at locations in the SRB where lowering the thermal environment would impact the TPS design. The ascent thermal environments are documented along with the wind tunnel/flight test data base used as well as the trajectory and environment generation methodology. Methodology, as well as, environment summaries compared to the 1980 Design and Rockwell IVBC-3 Design Environment are presented in this volume, 1

    Axial charges of octet and decuplet baryons

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    We present a study of axial charges of baryon ground and resonant states with relativistic constituent quark models. In particular, the axial charges of octet and decuplet NN, Σ\Sigma, Ξ\Xi, Δ\Delta, Σ∗\Sigma^*, and Ξ∗\Xi^* baryons are considered. The theoretical predictions are compared to existing experimental data and results from other approaches, notably from lattice quantum chromodynamics and chiral perturbation theory. The relevance of axial charges with regard to π\pi-dressing and spontaneous chiral-symmetry breaking is discussed
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