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Author: Anthony E. Cerkanowicz
Publisher:
ISBN:
Category :
Languages : en
Pages : 33
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Book Description
Radiative initiation and enhancement of combustion in unsensitized fuel-air mixtures via the photodissociation of oxygen molecules and combustion intermediary species is being investigated. Pulsed VUV (vacuum ultraviolet) light sources and continuous UV (ultraviolet) light sources are being used for this purpose. Experimental efforts are directed at elucidation of light source conversion efficiency and spectral characteristics, and reactant mixture-photon interactions. A complimentary effort involves the development of analytical capability required for modeling photochemical initiation and enhancement of combustion. (Author).
Author: Anthony E. Cerkanowicz
Publisher:
ISBN:
Category :
Languages : en
Pages : 33
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Book Description
Radiative initiation and enhancement of combustion in unsensitized fuel-air mixtures via the photodissociation of oxygen molecules and combustion intermediary species is being investigated. Pulsed VUV (vacuum ultraviolet) light sources and continuous UV (ultraviolet) light sources are being used for this purpose. Experimental efforts are directed at elucidation of light source conversion efficiency and spectral characteristics, and reactant mixture-photon interactions. A complimentary effort involves the development of analytical capability required for modeling photochemical initiation and enhancement of combustion. (Author).
Author: A. E. Cerkanowicz
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Book Description
Two novel concepts for extending aircraft operational range have been researched under this contract. They are radiative and catalytic augmentation techniques. The feasibility of utilizing these techniques to alter (augment) combustion initiation and reaction kinetics which restrict combustor operation via limits on flammability, flame propagation, ignition and stability has been investigated. Both techniques have demonstrated the potential to improve combustion processes. The radiative technique under laboratory static conditions has successfully ignited fuel-air mixtures, and has enhanced combustion processes, utilizing pulsed and continuous vacuum ultraviolet light sources. Similarly, the catalytic technique has broadened stability limits under normally difficult fuel lean, low temperature conditions. Complementary efforts have focused on the developement of analytical capabilities required for modeling the radiative and catalytic techniques. (Author).
Author: T. J. Ohlemiller
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
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Book Description
An experimental situation was devised in which the gaseous flame of a regressing solid propellant was suppressed and replaced by a radiative input to the sample surface so as to allow a detailed examination of the energetics of propellant gasification. The desired flameless regression condition was attained for at least two PBAA/AP compositions. However, two seriously detrimental effects entered into the experiments: an abnormally large proportion of AP was ejected from the regressing sample surface and the unejected fraction largely sublimed without further reaction. The combination of these two factors and the very low pressures required in the tests severly limits the applicability of the results to normal propellant combustion. (Author).
Author: Moshe David
Publisher:
ISBN:
Category :
Languages : en
Pages : 55
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Book Description
Radiative augmented combustion is based on the fact that radiation of selected wavelengths is capable of photodissociating stable molecules, combustion intermediates and other inhibiting species into reactive radicals. Subsequent increases in concentrations of these radicals can modify the overall kinetics and produce radiative ignition and combustion enhancements. The potential of this technique was previously demonstrated under static conditions. Recently, it has been also demonstrated under flow conditions, with advanced vacuum ultraviolet (VUV) and ultraviolet (UV) light sources. This program emphasizes research on the interaction between VUV/UV radiation and combustion under flow conditions. The main objective is to demonstrate proof of concept by radiatively igniting combustible mixtures at conditions where thermal ignition is unreliable. Additional objectives are to provide non-intrusive (optical) flameholding and to increase flame speed. Another important goal is to improve the fundamental understanding of the role of photochemical reactions within the whole kinetic scheme, and ultimately to identify the most effective photodissociative path. Consequently, the program is divided into two main subjects: ignition and enhancement.
Author: Marshall Chester Burrows
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 24
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Book Description
Author: Martin Summerfield
Publisher: AIAA
ISBN: 9781600863967
Category : Solid propellants
Languages : en
Pages : 922
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 400
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1048
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Book Description
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 820
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Book Description
Author: Richard Gann
Publisher: Jones & Bartlett Learning
ISBN: 1284252477
Category : Technology & Engineering
Languages : en
Pages : 392
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Book Description
Principles of Fire Behavior and Combustion, Fifth Edition with Navigate Advantage Access is the most current and accurate source of fire behavior information available to firefighters and fire science students today. Readers will develop a thorough understanding of the chemical and physical properties of flammable materials and fire, the combustion process, and the latest in suppression and extinguishment.
