EXPERIMENTAL STUDY OF THREE-DIMENSIONAL TURBULENT JET-SOLID BOUNDARY INTERACTION.
Item
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Title
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EXPERIMENTAL STUDY OF THREE-DIMENSIONAL TURBULENT JET-SOLID BOUNDARY INTERACTION.
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Identifier
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AAI8713805
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identifier
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8713805
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Creator
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TSITOURAS, CHRISTOS D.
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Contributor
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Herbert K ayser
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Date
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1987
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Mechanical
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Abstract
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A comprehensive experimental study was carried out to investigate jet-boundary interaction of blocked three-dimensional turbulent air jets discharging offset and the parallel to a solid boundary. The study was undertaken to establish the general flow and thermal characteristics associated with this configuration. Attention was focused on surface pressure distribution, jet trajectory and velocity and temperature distributions. Three outlets of aspect ratio, 0.1, 0.25 and 0.44, as well as the two-dimensional case (e = 0) were investigated at offset distances ranging from 0 (wall jet) to (INFIN) (free jet). The discharge Reynolds number ranged from 26,000 to 55,000. Flow visualization, employing smoke and oil/lampblack techniques, was used to determine gross jet spread behavior as well as the reattachment location.;Mapping of surface pressure revealed a complex two-dimensional pattern of sub-ambient and above ambient pressure distribution. Comparisons between three-dimensional and two-dimensional jets showed similarities as well as significant differences. Similarities at asymptotic conditions associated with the discharge aspect ratio e and offset distance h were examined. For eh << 1, the behavior of three-dimensional jets was found to approach that of two-dimensional slot jets. The influence of the offset surface on flow and thermal characteristics increased as h was decreased. Maximum velocity and temperature decays were shown to be similar to those of free jets in upstream regions and to approach wall jet decay further downstream.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Engineering
