933 resultados para Balls populars-Alacant-Gravat


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Inscripción en la parte inferior: "A. Parroquia de la Asumpcion B. Parroquia del Angel C. Moncófa"

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Existe otra tirada sin colorear

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Estampada en la misma hoja con el grabado de "Vista de Almenara, tomada de Murviedro" y con huella de plancha común (53'5 x 31'5 cm)

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Estampada en la misma hoja con dos grabados del Lago de Almenara y con huella de plancha común (53'5 x 31'5 cm)

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Resumen: Descripción: vista del Convento de San Miguel de los Reyes desde la huerta de Benimaclet, teniendo por fondo las montañas de Portaceli

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It has been reasoned that the structures of strongly cellular flames in very lean mixtures approach an array of flame balls, each burning as if it were isolated, thereby indicating a connection between the critical conditions required for existence of steady flame balls and those necessary for occurrence of self-sustained premixed combustion. This is the starting assumption of the present study, in which structures of near-limit steady sphericosym-metrical flame balls are investigated with the objective of providing analytic expressions for critical combustion conditions in ultra-lean hydrogen-oxygen mixtures diluted with N2 and water vapor. If attention were restricted to planar premixed flames, then the lean-limit mole fraction of H2 would be found to be roughly ten percent, more than twice the observed flammability limits, thereby emphasizing the relevance of the flame-ball phenomena. Numerical integrations using detailed models for chemistry and radiation show that a onestep chemical-kinetic reduced mechanism based on steady-state assumptions for all chemical intermediates, together with a simple, optically thin approximation for water-vapor radiation, can be used to compute near-limit fuel-lean flame balls with excellent accuracy. The previously developed one-step reaction rate includes a crossover temperature that determines in the first approximation a chemical-kinetic lean limit below which combustión cannot occur, with critical conditions achieved when the diffusion-controlled radiation-free peak temperature, computed with account taken of hydrogen Soret diffusion, is equal to the crossover temperature. First-order corrections are found by activation-energy asymptotics in a solution that involves a near-field radiation-free zone surrounding a spherical flame sheet, together with a far-field radiation-conduction balance for the temperature profile. Different scalings are found depending on whether or not the surrounding atmosphere contains wáter vapor, leading to different analytic expressions for the critical conditions for flame-ball existence, which give results in very good agreement with those obtained by detailed numerical computations.

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Hay un ejemplar encuadernado con: El Romancero de la Santa Faz o sea Historia en verso de la milagrosa efigie que se venera en el Monasterio de Santa Veronica... situado en la huerta de Alicante (CV/5454).

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Obsequio de La Correspondencia Alicantina a las senoritas y senores que tomaron parte en la funcion de beneficencia, celebrada en el Teatro Principal la noche del 15 de diciembre de 1895

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Estampado en la misma hoja con: "Vista de Chulilla"

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Estampado en la misma hoja con: "Vista de Villa Fames"

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