An Analytical Study of Diffusion Flames in Vortex Structures PDF Download
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Author: Ann Renee Karagozian
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 119
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Author: Ann Renee Karagozian
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 119
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Author: Ann R. Karagozian
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: SHEAU-MING SHIAH
Publisher:
ISBN:
Category :
Languages : en
Pages : 392
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approximation of a viscous vortex by a potential vortex are also developed.
Author: A.M. Laverdant
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Author: A. Laverdant
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
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Author: Yuri Dubnishchev
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0
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The chapter presents the results of an experimental study of hydrodynamics and diffusion combustion of jets flowing out of long tubes in the Reynolds number range 200,Äì13,500 into air. The methods used in the experiments are visualization in the ultraviolet region, PIV, and hot-wire anemometry. The amplitude-phase structure of optical filters in systems of the Hilbert diagnostics of phase optical density fields in gaseous and condensed systems was used in this work. A possibility of visualization of disturbances in phase optical density fields with arbitrary amplitudes is demonstrated. Two geometries are studied: jet combustion in a stationary atmosphere and in a cross flow. Propane and hydrogen in a mixture with an inert diluent (CO2) were used as fuels. In the isothermal jet stream, propane-butane mixture and Freon-22 are used. The main attention in the problem is paid to the mechanism of pipe and jet instability interaction, resulting in the vortex motion in several spatial regions. For critical Reynolds numbers in a pipe, the characteristic is the mechanism of two-stage instability caused by turbulent spot (puff) formation inside the pipe and vortex structure generation in the jet-mixing layer. These vortex structures (puff) exert a strong influence both on the isothermal jet and on the flame.
Author: Bose V. S. Manda
Publisher:
ISBN:
Category :
Languages : en
Pages : 278
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Author: R. Borghi
Publisher: Springer Science & Business Media
ISBN: 146139631X
Category : Science
Languages : en
Pages : 958
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Turbulent reactive flows are of common occurrance in combustion engineering, chemical reactor technology and various types of engines producing power and thrust utilizing chemical and nuclear fuels. Pollutant formation and dispersion in the atmospheric environment and in rivers, lakes and ocean also involve interactions between turbulence, chemical reactivity and heat and mass transfer processes. Considerable advances have occurred over the past twenty years in the understanding, analysis, measurement, prediction and control of turbulent reactive flows. Two main contributors to such advances are improvements in instrumentation and spectacular growth in computation: hardware, sciences and skills and data processing software, each leading to developments in others. Turbulence presents several features that are situation-specific. Both for that reason and a number of others, it is yet difficult to visualize a so-called solution of the turbulence problem or even a generalized approach to the problem. It appears that recognition of patterns and structures in turbulent flow and their study based on considerations of stability, interactions, chaos and fractal character may be opening up an avenue of research that may be leading to a generalized approach to classification and analysis and, possibly, prediction of specific processes in the flowfield. Predictions for engineering use, on the other hand, can be foreseen for sometime to come to depend upon modeling of selected features of turbulence at various levels of sophistication dictated by perceived need and available capability.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 704
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Author:
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 138
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