Showing papers by "Raymond Viskanta published in 1991"
TL;DR: In this article, surface temperature and heat flux distributions have been measured on a flat, upward facing, constant heat flux surface cooled by a planar, impinging water jet, and the results for the stagnation and boundary layer flows are correlated by expressions of the form Nu = CRenPrm.
83 citations
TL;DR: In this article, a new apparatus was developed to measure local convection coefficients for heat transfer to an impinging liquid jet, which is unique in that heat fluxes sufficient to induce steady convective boiling were delivered to an area large enough to accomodate local measurements.
25 citations
TL;DR: In this paper, the transient behavior of an active thermal protection system consisting of a semi-infinite layer of a porous medium with gas injection is considered, and the thermal penetration depth, surface temperature and surface heat flux do not depend on the gas injection velocity.
7 citations
TL;DR: In this article, the effect of radiation heat transfer on the transient combustion of a single fuel droplet with a finite rate of chemical reaction and variable physical properties has been clarified under the assumptions of spherical symmetry.
Abstract: The effect of radiation heat transfer on the transient combustion of a single fuel droplet with a finite rate of chemical reaction and variable physical properties has been clarified under the assumptions of spherical symmetry. Evaporation curves, transient variation of flame location, temperature profiles, and the ratio of flame to droplet radius were compared to the previous results without radiation effect. It was shown that the radiation has at least a 25-percent effect to lower the maximum flame temperature. Further, the present results were compared to the experimental results obtained by several researchers.
6 citations