Analysis of the Mixing and Combustion of Gaseous and Particle-laden Jets in an Air Stream PDF Download
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Author: Joseph A. Schetz
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 8
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Author: Joseph A. Schetz
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 8
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Author: Steven W. Abbott
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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Using water-cooled probes and hot-gas valves, gas-particle samples were withdrawn from the secondary duct of an air-augmented laboratory burner. Using a boron-loaded propellant, air/fuel ratio and secondary duct pressure were varied from 12/1 to 32/1 and from 82 to 127 psia respectively. From sample analysis of chlorine, argon (air tracer), boron, and boron oxide, radial and axial profiles of air, gaseous fuel, particulate fuel and percent of boron combustion were determined. Particles and gases mixed at significantly different rates. Measured gas-phase mixing rates were more rapid than model predictions, which assumed particles to be in equilibrium with gases. Boron combustion efficiency varied markedly with duct position, air/fuel ratio and secondary chamber pressure. (Author).
Author: Gregory Scott Anderson
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 178
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Author:
Publisher:
ISBN:
Category : Gas dynamics
Languages : en
Pages : 236
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Author: L. Douglas Smoot
Publisher:
ISBN:
Category :
Languages : en
Pages : 165
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The general objectives of this study were to provide predictive techniques for air-breathing, particle-laden combustors and experimental data on rates of combustion and/or mixing of particle-laden jets. Jet mixing model predictions were compared with experiments reported in the literature. This led to the development of a turbulent mixing coefficient that improved predictions for systems with nonzero secondary velocity and gave reasonable predictions for reacting jets. The mixing model was extended to include boron particle nonequilibrium effects. Several predictions with this uncoupled model are also shown. A fully coupled turbulent jet mixing model was developed for a nonreacting, particle-gas system. Tests were made using a laboratory air-augmented combustor and a boron-loaded fuel. Mixing rates of particles and of gases were measured, as was extent of combustion of the boron particles. Tests were made using a new jet test facility for measuring mixing rates of particle-laden, nonreacting jets. Mixing rates of particles and gases were separately measured. Particle size, jet density and air velocity were systematically varied. (Modified author abstract).
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 970
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 592
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Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 620
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1028
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1060
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